diff --git a/src/components/fx/hover.js b/src/components/fx/hover.js
index a8738cf3f6e..ddcebd1c9e8 100644
--- a/src/components/fx/hover.js
+++ b/src/components/fx/hover.js
@@ -1609,11 +1609,11 @@ function cleanPoint(d, hovermode) {
 
     // and convert the x and y label values into formatted text
     if(d.xLabelVal !== undefined) {
-        d.xLabel = ('xLabel' in d) ? d.xLabel : Axes.hoverLabelText(d.xa, d.xLabelVal);
+        d.xLabel = ('xLabel' in d) ? d.xLabel : Axes.hoverLabelText(d.xa, d.xLabelVal, trace.xhoverformat);
         d.xVal = d.xa.c2d(d.xLabelVal);
     }
     if(d.yLabelVal !== undefined) {
-        d.yLabel = ('yLabel' in d) ? d.yLabel : Axes.hoverLabelText(d.ya, d.yLabelVal);
+        d.yLabel = ('yLabel' in d) ? d.yLabel : Axes.hoverLabelText(d.ya, d.yLabelVal, trace.yhoverformat);
         d.yVal = d.ya.c2d(d.yLabelVal);
     }
 
diff --git a/src/plots/cartesian/axes.js b/src/plots/cartesian/axes.js
index d2fb02d908e..ab469748308 100644
--- a/src/plots/cartesian/axes.js
+++ b/src/plots/cartesian/axes.js
@@ -1361,16 +1361,23 @@ axes.tickText = function(ax, x, hover, noSuffixPrefix) {
  * log axes (where negative values can't be displayed but can appear in hover text)
  *
  * @param {object} ax: the axis to format text for
- * @param {number} val: calcdata value to format
- * @param {Optional(number)} val2: a second value to display
+ * @param {number or array of numbers} values: calcdata value(s) to format
+ * @param {Optional(string)} hoverformat: trace (x|y)hoverformat to override axis.hoverformat
  *
  * @returns {string} `val` formatted as a string appropriate to this axis, or
- *     `val` and `val2` as a range (ie '<val> - <val2>') if `val2` is provided and
- *     it's different from `val`.
+ *     first value and second value as a range (ie '<val1> - <val2>') if the second value is provided and
+ *     it's different from the first value.
  */
-axes.hoverLabelText = function(ax, val, val2) {
-    if(val2 !== BADNUM && val2 !== val) {
-        return axes.hoverLabelText(ax, val) + ' - ' + axes.hoverLabelText(ax, val2);
+axes.hoverLabelText = function(ax, values, hoverformat) {
+    if(hoverformat) ax = Lib.extendFlat({}, ax, {hoverformat: hoverformat});
+
+    var val = Array.isArray(values) ? values[0] : values;
+    var val2 = Array.isArray(values) ? values[1] : undefined;
+    if(val2 !== undefined && val2 !== val) {
+        return (
+            axes.hoverLabelText(ax, val, hoverformat) + ' - ' +
+            axes.hoverLabelText(ax, val2, hoverformat)
+        );
     }
 
     var logOffScale = (ax.type === 'log' && val <= 0);
diff --git a/src/plots/cartesian/layout_attributes.js b/src/plots/cartesian/layout_attributes.js
index ea2b420c75e..88a96672e34 100644
--- a/src/plots/cartesian/layout_attributes.js
+++ b/src/plots/cartesian/layout_attributes.js
@@ -6,8 +6,10 @@ var dash = require('../../components/drawing/attributes').dash;
 var extendFlat = require('../../lib/extend').extendFlat;
 var templatedArray = require('../../plot_api/plot_template').templatedArray;
 
-var FORMAT_LINK = require('../../constants/docs').FORMAT_LINK;
-var DATE_FORMAT_LINK = require('../../constants/docs').DATE_FORMAT_LINK;
+var docs = require('../../constants/docs');
+var FORMAT_LINK = docs.FORMAT_LINK;
+var DATE_FORMAT_LINK = docs.DATE_FORMAT_LINK;
+
 var ONEDAY = require('../../constants/numerical').ONEDAY;
 var constants = require('./constants');
 var HOUR = constants.HOUR_PATTERN;
diff --git a/src/plots/gl3d/scene.js b/src/plots/gl3d/scene.js
index 6e89d682e5d..b7ee3871218 100644
--- a/src/plots/gl3d/scene.js
+++ b/src/plots/gl3d/scene.js
@@ -322,10 +322,14 @@ proto.render = function() {
         if(trace.setContourLevels) trace.setContourLevels();
     }
 
-    function formatter(axisName, val) {
-        var axis = scene.fullSceneLayout[axisName];
+    function formatter(axLetter, val, hoverformat) {
+        var ax = scene.fullSceneLayout[axLetter + 'axis'];
 
-        return Axes.tickText(axis, axis.d2l(val), 'hover').text;
+        if(ax.type !== 'log') {
+            val = ax.d2l(val);
+        }
+
+        return Axes.hoverLabelText(ax, val, hoverformat);
     }
 
     var oldEventData;
@@ -337,9 +341,9 @@ proto.render = function() {
         var ptNumber = selection.index;
 
         var labels = {
-            xLabel: formatter('xaxis', selection.traceCoordinate[0]),
-            yLabel: formatter('yaxis', selection.traceCoordinate[1]),
-            zLabel: formatter('zaxis', selection.traceCoordinate[2])
+            xLabel: formatter('x', selection.traceCoordinate[0], trace.xhoverformat),
+            yLabel: formatter('y', selection.traceCoordinate[1], trace.yhoverformat),
+            zLabel: formatter('z', selection.traceCoordinate[2], trace.zhoverformat)
         };
 
         var hoverinfo = Fx.castHoverinfo(traceNow, scene.fullLayout, ptNumber);
@@ -358,17 +362,17 @@ proto.render = function() {
         var vectorTx = [];
 
         if(trace.type === 'cone' || trace.type === 'streamtube') {
-            labels.uLabel = formatter('xaxis', selection.traceCoordinate[3]);
+            labels.uLabel = formatter('x', selection.traceCoordinate[3], trace.uhoverformat);
             if(isHoverinfoAll || hoverinfoParts.indexOf('u') !== -1) {
                 vectorTx.push('u: ' + labels.uLabel);
             }
 
-            labels.vLabel = formatter('yaxis', selection.traceCoordinate[4]);
+            labels.vLabel = formatter('y', selection.traceCoordinate[4], trace.vhoverformat);
             if(isHoverinfoAll || hoverinfoParts.indexOf('v') !== -1) {
                 vectorTx.push('v: ' + labels.vLabel);
             }
 
-            labels.wLabel = formatter('zaxis', selection.traceCoordinate[5]);
+            labels.wLabel = formatter('z', selection.traceCoordinate[5], trace.whoverformat);
             if(isHoverinfoAll || hoverinfoParts.indexOf('w') !== -1) {
                 vectorTx.push('w: ' + labels.wLabel);
             }
@@ -388,7 +392,7 @@ proto.render = function() {
             }
             tx = vectorTx.join('<br>');
         } else if(trace.type === 'isosurface' || trace.type === 'volume') {
-            labels.valueLabel = Axes.tickText(scene._mockAxis, scene._mockAxis.d2l(selection.traceCoordinate[3]), 'hover').text;
+            labels.valueLabel = Axes.hoverLabelText(scene._mockAxis, scene._mockAxis.d2l(selection.traceCoordinate[3]), trace.valuehoverformat);
             vectorTx.push('value: ' + labels.valueLabel);
             if(selection.textLabel) {
                 vectorTx.push(selection.textLabel);
diff --git a/src/plots/hoverformat_attributes.js b/src/plots/hoverformat_attributes.js
new file mode 100644
index 00000000000..58ef52c0010
--- /dev/null
+++ b/src/plots/hoverformat_attributes.js
@@ -0,0 +1,27 @@
+'use strict';
+
+var docs = require('../constants/docs');
+var FORMAT_LINK = docs.FORMAT_LINK;
+var DATE_FORMAT_LINK = docs.DATE_FORMAT_LINK;
+
+module.exports = function axisHoverFormat(x, noDates) {
+    return {
+        valType: 'string',
+        dflt: '',
+        editType: 'none',
+        description: [
+            'Sets the hover text formatting rule for `' + x + '`',
+            ' using d3 formatting mini-languages which are very similar to those in Python.',
+            'See: ' + FORMAT_LINK + (
+                noDates ?
+                    '' :
+                    ' And for dates see: ' + DATE_FORMAT_LINK
+                ),
+            'By default the values are formatted using ' + (
+                noDates ?
+                    'generic number format' :
+                    ('`' + x + 'axis.hoverformat`')
+            ) + '.',
+        ].join(' ')
+    };
+};
diff --git a/src/plots/template_attributes.js b/src/plots/template_attributes.js
index efcaba0c77c..70a0e536d87 100644
--- a/src/plots/template_attributes.js
+++ b/src/plots/template_attributes.js
@@ -1,7 +1,8 @@
 'use strict';
 
-var FORMAT_LINK = require('../constants/docs').FORMAT_LINK;
-var DATE_FORMAT_LINK = require('../constants/docs').DATE_FORMAT_LINK;
+var docs = require('../constants/docs');
+var FORMAT_LINK = docs.FORMAT_LINK;
+var DATE_FORMAT_LINK = docs.DATE_FORMAT_LINK;
 
 var templateFormatStringDescription = [
     'Variables are inserted using %{variable}, for example "y: %{y}".',
diff --git a/src/traces/bar/attributes.js b/src/traces/bar/attributes.js
index 3e32060afd2..6dd46228fb5 100644
--- a/src/traces/bar/attributes.js
+++ b/src/traces/bar/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var scatterAttrs = require('../scatter/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
 var colorScaleAttrs = require('../../components/colorscale/attributes');
@@ -104,6 +105,8 @@ module.exports = {
     yperiod0: scatterAttrs.yperiod0,
     xperiodalignment: scatterAttrs.xperiodalignment,
     yperiodalignment: scatterAttrs.yperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     text: scatterAttrs.text,
     texttemplate: texttemplateAttrs({editType: 'plot'}, {
diff --git a/src/traces/bar/defaults.js b/src/traces/bar/defaults.js
index 631afc4d16a..2ea8c258e2c 100644
--- a/src/traces/bar/defaults.js
+++ b/src/traces/bar/defaults.js
@@ -24,6 +24,8 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('orientation', (traceOut.x && !traceOut.y) ? 'h' : 'v');
     coerce('base');
diff --git a/src/traces/bar/hover.js b/src/traces/bar/hover.js
index ee0d226d027..e6023543686 100644
--- a/src/traces/bar/hover.js
+++ b/src/traces/bar/hover.js
@@ -170,9 +170,9 @@ function hoverOnBars(pointData, xval, yval, hovermode) {
     var hasPeriod = di.orig_p !== undefined;
     pointData[posLetter + 'LabelVal'] = hasPeriod ? di.orig_p : di.p;
 
-    pointData.labelLabel = hoverLabelText(pa, pointData[posLetter + 'LabelVal']);
-    pointData.valueLabel = hoverLabelText(sa, pointData[sizeLetter + 'LabelVal']);
-    pointData.baseLabel = hoverLabelText(sa, di.b);
+    pointData.labelLabel = hoverLabelText(pa, pointData[posLetter + 'LabelVal'], trace[posLetter + 'hoverformat']);
+    pointData.valueLabel = hoverLabelText(sa, pointData[sizeLetter + 'LabelVal'], trace[sizeLetter + 'hoverformat']);
+    pointData.baseLabel = hoverLabelText(sa, di.b, trace[sizeLetter + 'hoverformat']);
 
     // spikelines always want "closest" distance regardless of hovermode
     pointData.spikeDistance = (thisBarSizeFn(di) + thisBarPositionFn(di)) / 2;
diff --git a/src/traces/box/attributes.js b/src/traces/box/attributes.js
index 0afc351edd7..2d4ca2755c0 100644
--- a/src/traces/box/attributes.js
+++ b/src/traces/box/attributes.js
@@ -3,6 +3,7 @@
 var scatterAttrs = require('../scatter/attributes');
 var barAttrs = require('../bar/attributes');
 var colorAttrs = require('../../components/color/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var extendFlat = require('../../lib/extend').extendFlat;
 
@@ -70,6 +71,8 @@ module.exports = {
     yperiod0: scatterAttrs.yperiod0,
     xperiodalignment: scatterAttrs.xperiodalignment,
     yperiodalignment: scatterAttrs.yperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     name: {
         valType: 'string',
diff --git a/src/traces/box/defaults.js b/src/traces/box/defaults.js
index 0a5c66c9f89..ad037009559 100644
--- a/src/traces/box/defaults.js
+++ b/src/traces/box/defaults.js
@@ -17,6 +17,8 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
     if(traceOut.visible === false) return;
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     var hasPreCompStats = traceOut._hasPreCompStats;
 
diff --git a/src/traces/box/hover.js b/src/traces/box/hover.js
index 901ddb3399e..6ae73777347 100644
--- a/src/traces/box/hover.js
+++ b/src/traces/box/hover.js
@@ -166,7 +166,7 @@ function hoverOnBoxes(pointData, xval, yval, hovermode) {
         pointData2.attr = attr;
         pointData2[vLetter + '0'] = pointData2[vLetter + '1'] = valPx;
         pointData2[vLetter + 'LabelVal'] = val;
-        pointData2[vLetter + 'Label'] = (t.labels ? t.labels[attr] + ' ' : '') + Axes.hoverLabelText(vAxis, val);
+        pointData2[vLetter + 'Label'] = (t.labels ? t.labels[attr] + ' ' : '') + Axes.hoverLabelText(vAxis, val, trace[vLetter + 'hoverformat']);
 
         // Note: introduced to be able to distinguish a
         // clicked point from a box during click-to-select
diff --git a/src/traces/candlestick/attributes.js b/src/traces/candlestick/attributes.js
index 3e310a76139..5bd37ebcb8b 100644
--- a/src/traces/candlestick/attributes.js
+++ b/src/traces/candlestick/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var extendFlat = require('../../lib').extendFlat;
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var OHLCattrs = require('../ohlc/attributes');
 var boxAttrs = require('../box/attributes');
 
@@ -21,6 +22,8 @@ module.exports = {
     xperiod: OHLCattrs.xperiod,
     xperiod0: OHLCattrs.xperiod0,
     xperiodalignment: OHLCattrs.xperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     x: OHLCattrs.x,
     open: OHLCattrs.open,
@@ -46,6 +49,7 @@ module.exports = {
 
     text: OHLCattrs.text,
     hovertext: OHLCattrs.hovertext,
+
     whiskerwidth: extendFlat({}, boxAttrs.whiskerwidth, { dflt: 0 }),
 
     hoverlabel: OHLCattrs.hoverlabel,
diff --git a/src/traces/candlestick/defaults.js b/src/traces/candlestick/defaults.js
index 2b69f033bb5..43ca40f8809 100644
--- a/src/traces/candlestick/defaults.js
+++ b/src/traces/candlestick/defaults.js
@@ -18,6 +18,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce, {x: true});
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('line.width');
 
diff --git a/src/traces/carpet/axis_attributes.js b/src/traces/carpet/axis_attributes.js
index 97b129f7dc6..e3548c68d8b 100644
--- a/src/traces/carpet/axis_attributes.js
+++ b/src/traces/carpet/axis_attributes.js
@@ -5,8 +5,9 @@ var colorAttrs = require('../../components/color/attributes');
 var axesAttrs = require('../../plots/cartesian/layout_attributes');
 var overrideAll = require('../../plot_api/edit_types').overrideAll;
 
-var FORMAT_LINK = require('../../constants/docs').FORMAT_LINK;
-var DATE_FORMAT_LINK = require('../../constants/docs').TIME_FORMAT_LINK;
+var docs = require('../../constants/docs');
+var FORMAT_LINK = docs.FORMAT_LINK;
+var DATE_FORMAT_LINK = docs.DATE_FORMAT_LINK;
 
 module.exports = {
     color: {
diff --git a/src/traces/cone/attributes.js b/src/traces/cone/attributes.js
index 3181e854e3a..640fa2e0ae0 100644
--- a/src/traces/cone/attributes.js
+++ b/src/traces/cone/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var mesh3dAttrs = require('../mesh3d/attributes');
 var baseAttrs = require('../../plots/attributes');
@@ -152,6 +153,13 @@ var attrs = {
     },
 
     hovertemplate: hovertemplateAttrs({editType: 'calc'}, {keys: ['norm']}),
+    uhoverformat: axisHoverFormat('u', 1),
+    vhoverformat: axisHoverFormat('v', 1),
+    whoverformat: axisHoverFormat('w', 1),
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+
     showlegend: extendFlat({}, baseAttrs.showlegend, {dflt: false})
 };
 
diff --git a/src/traces/cone/defaults.js b/src/traces/cone/defaults.js
index 479ff0205a0..0516c8635d1 100644
--- a/src/traces/cone/defaults.js
+++ b/src/traces/cone/defaults.js
@@ -45,6 +45,12 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('uhoverformat');
+    coerce('vhoverformat');
+    coerce('whoverformat');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
+    coerce('zhoverformat');
 
     // disable 1D transforms (for now)
     traceOut._length = null;
diff --git a/src/traces/contour/attributes.js b/src/traces/contour/attributes.js
index 350cb1766b9..dd59ee803d4 100644
--- a/src/traces/contour/attributes.js
+++ b/src/traces/contour/attributes.js
@@ -2,6 +2,7 @@
 
 var heatmapAttrs = require('../heatmap/attributes');
 var scatterAttrs = require('../scatter/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var colorScaleAttrs = require('../../components/colorscale/attributes');
 var dash = require('../../components/drawing/attributes').dash;
 var fontAttrs = require('../../plots/font_attributes');
@@ -36,7 +37,9 @@ module.exports = extendFlat({
     transpose: heatmapAttrs.transpose,
     xtype: heatmapAttrs.xtype,
     ytype: heatmapAttrs.ytype,
-    zhoverformat: heatmapAttrs.zhoverformat,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z', 1),
     hovertemplate: heatmapAttrs.hovertemplate,
     hoverongaps: heatmapAttrs.hoverongaps,
     connectgaps: extendFlat({}, heatmapAttrs.connectgaps, {
diff --git a/src/traces/contour/defaults.js b/src/traces/contour/defaults.js
index e5a4b0424fb..d0ce4a55428 100644
--- a/src/traces/contour/defaults.js
+++ b/src/traces/contour/defaults.js
@@ -26,6 +26,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('text');
     coerce('hovertext');
diff --git a/src/traces/funnel/attributes.js b/src/traces/funnel/attributes.js
index dc921f32ec2..1c7e5ef5223 100644
--- a/src/traces/funnel/attributes.js
+++ b/src/traces/funnel/attributes.js
@@ -3,6 +3,7 @@
 var barAttrs = require('../bar/attributes');
 var lineAttrs = require('../scatter/attributes').line;
 var baseAttrs = require('../../plots/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
 var constants = require('./constants');
@@ -23,6 +24,8 @@ module.exports = {
     yperiod0: barAttrs.yperiod0,
     xperiodalignment: barAttrs.xperiodalignment,
     yperiodalignment: barAttrs.yperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     hovertext: barAttrs.hovertext,
     hovertemplate: hovertemplateAttrs({}, {
diff --git a/src/traces/funnel/defaults.js b/src/traces/funnel/defaults.js
index 85ad6ff466a..74c2238a72d 100644
--- a/src/traces/funnel/defaults.js
+++ b/src/traces/funnel/defaults.js
@@ -21,6 +21,8 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('orientation', (traceOut.y && !traceOut.x) ? 'v' : 'h');
     coerce('offset');
diff --git a/src/traces/heatmap/attributes.js b/src/traces/heatmap/attributes.js
index 750c4f68986..be43069692b 100644
--- a/src/traces/heatmap/attributes.js
+++ b/src/traces/heatmap/attributes.js
@@ -2,9 +2,9 @@
 
 var scatterAttrs = require('../scatter/attributes');
 var baseAttrs = require('../../plots/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var colorScaleAttrs = require('../../components/colorscale/attributes');
-var FORMAT_LINK = require('../../constants/docs').FORMAT_LINK;
 
 var extendFlat = require('../../lib/extend').extendFlat;
 
@@ -111,16 +111,10 @@ module.exports = extendFlat({
         editType: 'plot',
         description: 'Sets the vertical gap (in pixels) between bricks.'
     },
-    zhoverformat: {
-        valType: 'string',
-        dflt: '',
-        editType: 'none',
-        description: [
-            'Sets the hover text formatting rule using d3 formatting mini-languages',
-            'which are very similar to those in Python. See:',
-            FORMAT_LINK
-        ].join(' ')
-    },
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z', 1),
+
     hovertemplate: hovertemplateAttrs(),
     showlegend: extendFlat({}, baseAttrs.showlegend, {dflt: false})
 }, {
diff --git a/src/traces/heatmap/defaults.js b/src/traces/heatmap/defaults.js
index 6b18dc0c7dd..a9fb34d3aa7 100644
--- a/src/traces/heatmap/defaults.js
+++ b/src/traces/heatmap/defaults.js
@@ -21,6 +21,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('text');
     coerce('hovertext');
diff --git a/src/traces/histogram/attributes.js b/src/traces/histogram/attributes.js
index 753aad4a69a..763ff0241a0 100644
--- a/src/traces/histogram/attributes.js
+++ b/src/traces/histogram/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var barAttrs = require('../bar/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var makeBinAttrs = require('./bin_attributes');
 var constants = require('./constants');
@@ -22,6 +23,9 @@ module.exports = {
         ].join(' ')
     },
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+
     text: extendFlat({}, barAttrs.text, {
         description: [
             'Sets hover text elements associated with each bar.',
diff --git a/src/traces/histogram/defaults.js b/src/traces/histogram/defaults.js
index 73ad3a78f3a..c71c7927f95 100644
--- a/src/traces/histogram/defaults.js
+++ b/src/traces/histogram/defaults.js
@@ -24,6 +24,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     var orientation = coerce('orientation', (y && !x) ? 'h' : 'v');
     var sampleLetter = orientation === 'v' ? 'x' : 'y';
diff --git a/src/traces/histogram/hover.js b/src/traces/histogram/hover.js
index 3e77b33da22..317c632e984 100644
--- a/src/traces/histogram/hover.js
+++ b/src/traces/histogram/hover.js
@@ -15,7 +15,7 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode) {
     if(!trace.cumulative.enabled) {
         var posLetter = trace.orientation === 'h' ? 'y' : 'x';
 
-        pointData[posLetter + 'Label'] = hoverLabelText(pointData[posLetter + 'a'], di.ph0, di.ph1);
+        pointData[posLetter + 'Label'] = hoverLabelText(pointData[posLetter + 'a'], [di.ph0, di.ph1], trace[posLetter + 'hoverformat']);
     }
 
     return pts;
diff --git a/src/traces/histogram2d/attributes.js b/src/traces/histogram2d/attributes.js
index ca5d6a3c02a..8f02b906261 100644
--- a/src/traces/histogram2d/attributes.js
+++ b/src/traces/histogram2d/attributes.js
@@ -4,6 +4,7 @@ var histogramAttrs = require('../histogram/attributes');
 var makeBinAttrs = require('../histogram/bin_attributes');
 var heatmapAttrs = require('../heatmap/attributes');
 var baseAttrs = require('../../plots/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var colorScaleAttrs = require('../../components/colorscale/attributes');
 
@@ -64,7 +65,9 @@ module.exports = extendFlat(
         xgap: heatmapAttrs.xgap,
         ygap: heatmapAttrs.ygap,
         zsmooth: heatmapAttrs.zsmooth,
-        zhoverformat: heatmapAttrs.zhoverformat,
+        xhoverformat: axisHoverFormat('x'),
+        yhoverformat: axisHoverFormat('y'),
+        zhoverformat: axisHoverFormat('z', 1),
         hovertemplate: hovertemplateAttrs({}, {keys: 'z'}),
         showlegend: extendFlat({}, baseAttrs.showlegend, {dflt: false})
     },
diff --git a/src/traces/histogram2d/defaults.js b/src/traces/histogram2d/defaults.js
index 8162274a2ef..4b942bbea0c 100644
--- a/src/traces/histogram2d/defaults.js
+++ b/src/traces/histogram2d/defaults.js
@@ -19,4 +19,6 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
     colorscaleDefaults(traceIn, traceOut, layout, coerce, {prefix: '', cLetter: 'z'});
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 };
diff --git a/src/traces/histogram2d/hover.js b/src/traces/histogram2d/hover.js
index 879b44cdc13..f645e5427d0 100644
--- a/src/traces/histogram2d/hover.js
+++ b/src/traces/histogram2d/hover.js
@@ -13,11 +13,12 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLay
     var ny = indices[0];
     var nx = indices[1];
     var cd0 = pointData.cd[0];
+    var trace = cd0.trace;
     var xRange = cd0.xRanges[nx];
     var yRange = cd0.yRanges[ny];
 
-    pointData.xLabel = hoverLabelText(pointData.xa, xRange[0], xRange[1]);
-    pointData.yLabel = hoverLabelText(pointData.ya, yRange[0], yRange[1]);
+    pointData.xLabel = hoverLabelText(pointData.xa, [xRange[0], xRange[1]], trace.xhoverformat);
+    pointData.yLabel = hoverLabelText(pointData.ya, [yRange[0], yRange[1]], trace.yhoverformat);
 
     return pts;
 };
diff --git a/src/traces/histogram2dcontour/attributes.js b/src/traces/histogram2dcontour/attributes.js
index 57d5cb4a2e7..0f8cca3fb62 100644
--- a/src/traces/histogram2dcontour/attributes.js
+++ b/src/traces/histogram2dcontour/attributes.js
@@ -3,6 +3,7 @@
 var histogram2dAttrs = require('../histogram2d/attributes');
 var contourAttrs = require('../contour/attributes');
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 
 var extendFlat = require('../../lib/extend').extendFlat;
 
@@ -38,7 +39,9 @@ module.exports = extendFlat({
         smoothing: contourAttrs.line.smoothing,
         editType: 'plot'
     },
-    zhoverformat: histogram2dAttrs.zhoverformat,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z', 1),
     hovertemplate: histogram2dAttrs.hovertemplate
 },
     colorScaleAttrs('', {
diff --git a/src/traces/histogram2dcontour/defaults.js b/src/traces/histogram2dcontour/defaults.js
index e7b3ea468d3..f60f2aadf70 100644
--- a/src/traces/histogram2dcontour/defaults.js
+++ b/src/traces/histogram2dcontour/defaults.js
@@ -23,4 +23,6 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     handleContoursDefaults(traceIn, traceOut, coerce, coerce2);
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 };
diff --git a/src/traces/isosurface/attributes.js b/src/traces/isosurface/attributes.js
index b98d500890a..7e7499314a6 100644
--- a/src/traces/isosurface/attributes.js
+++ b/src/traces/isosurface/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var meshAttrs = require('../mesh3d/attributes');
 var baseAttrs = require('../../plots/attributes');
@@ -206,6 +207,11 @@ var attrs = module.exports = overrideAll(extendFlat({
         description: 'Same as `text`.'
     },
     hovertemplate: hovertemplateAttrs(),
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+    valuehoverformat: axisHoverFormat('value', 1),
+
     showlegend: extendFlat({}, baseAttrs.showlegend, {dflt: false})
 },
 
diff --git a/src/traces/isosurface/defaults.js b/src/traces/isosurface/defaults.js
index d30037c4e3a..c0553d80897 100644
--- a/src/traces/isosurface/defaults.js
+++ b/src/traces/isosurface/defaults.js
@@ -43,7 +43,10 @@ function supplyIsoDefaults(traceIn, traceOut, defaultColor, layout, coerce) {
     var handleCalendarDefaults = Registry.getComponentMethod('calendars', 'handleTraceDefaults');
     handleCalendarDefaults(traceIn, traceOut, ['x', 'y', 'z'], layout);
 
+    coerce('valuehoverformat');
     ['x', 'y', 'z'].forEach(function(dim) {
+        coerce(dim + 'hoverformat');
+
         var capDim = 'caps.' + dim;
         var showCap = coerce(capDim + '.show');
         if(showCap) {
diff --git a/src/traces/mesh3d/attributes.js b/src/traces/mesh3d/attributes.js
index d9b34d38ca9..b0aebf3b5f9 100644
--- a/src/traces/mesh3d/attributes.js
+++ b/src/traces/mesh3d/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var surfaceAttrs = require('../surface/attributes');
 var baseAttrs = require('../../plots/attributes');
@@ -89,6 +90,10 @@ module.exports = extendFlat({
     },
     hovertemplate: hovertemplateAttrs({editType: 'calc'}),
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+
     delaunayaxis: {
         valType: 'enumerated',
         values: [ 'x', 'y', 'z' ],
diff --git a/src/traces/mesh3d/defaults.js b/src/traces/mesh3d/defaults.js
index 66f3dc4b0d9..c3e94d6501f 100644
--- a/src/traces/mesh3d/defaults.js
+++ b/src/traces/mesh3d/defaults.js
@@ -83,6 +83,9 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
+    coerce('zhoverformat');
 
     // disable 1D transforms
     // x/y/z should match lengths, and i/j/k should match as well, but
diff --git a/src/traces/ohlc/attributes.js b/src/traces/ohlc/attributes.js
index 6fc019825d0..7ce3c82b348 100644
--- a/src/traces/ohlc/attributes.js
+++ b/src/traces/ohlc/attributes.js
@@ -2,6 +2,7 @@
 
 var extendFlat = require('../../lib').extendFlat;
 var scatterAttrs = require('../scatter/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var dash = require('../../components/drawing/attributes').dash;
 var fxAttrs = require('../../components/fx/attributes');
 var delta = require('../../constants/delta.js');
@@ -28,6 +29,8 @@ module.exports = {
     xperiod: scatterAttrs.xperiod,
     xperiod0: scatterAttrs.xperiod0,
     xperiodalignment: scatterAttrs.xperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     x: {
         valType: 'data_array',
diff --git a/src/traces/ohlc/defaults.js b/src/traces/ohlc/defaults.js
index ee9178b17b8..9c0dc35086d 100644
--- a/src/traces/ohlc/defaults.js
+++ b/src/traces/ohlc/defaults.js
@@ -17,6 +17,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce, {x: true});
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('line.width');
     coerce('line.dash');
diff --git a/src/traces/ohlc/hover.js b/src/traces/ohlc/hover.js
index df8c6492717..e189c828733 100644
--- a/src/traces/ohlc/hover.js
+++ b/src/traces/ohlc/hover.js
@@ -125,14 +125,14 @@ function hoverSplit(pointData, xval, yval, hovermode) {
         var pointData2;
         if(val in usedVals) {
             pointData2 = usedVals[val];
-            pointData2.yLabel += '<br>' + t.labels[attr] + Axes.hoverLabelText(ya, val);
+            pointData2.yLabel += '<br>' + t.labels[attr] + Axes.hoverLabelText(ya, val, trace.yhoverformat);
         } else {
             // copy out to a new object for each new y-value to label
             pointData2 = Lib.extendFlat({}, closestPoint);
 
             pointData2.y0 = pointData2.y1 = valPx;
             pointData2.yLabelVal = val;
-            pointData2.yLabel = t.labels[attr] + Axes.hoverLabelText(ya, val);
+            pointData2.yLabel = t.labels[attr] + Axes.hoverLabelText(ya, val, trace.yhoverformat);
 
             pointData2.name = '';
 
@@ -162,7 +162,7 @@ function hoverOnPoints(pointData, xval, yval, hovermode) {
     var dir = di.dir;
 
     function getLabelLine(attr) {
-        return t.labels[attr] + Axes.hoverLabelText(ya, trace[attr][i]);
+        return t.labels[attr] + Axes.hoverLabelText(ya, trace[attr][i], trace.yhoverformat);
     }
 
     var hoverinfo = di.hi || trace.hoverinfo;
diff --git a/src/traces/scatter/attributes.js b/src/traces/scatter/attributes.js
index 0bccd03b4f2..7860cdd693a 100644
--- a/src/traces/scatter/attributes.js
+++ b/src/traces/scatter/attributes.js
@@ -1,5 +1,6 @@
 'use strict';
 
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var colorScaleAttrs = require('../../components/colorscale/attributes');
@@ -118,6 +119,8 @@ module.exports = {
     yperiod0: axisPeriod0('y0'),
     xperiodalignment: axisPeriodAlignment('x'),
     yperiodalignment: axisPeriodAlignment('y'),
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     stackgroup: {
         valType: 'string',
@@ -248,6 +251,7 @@ module.exports = {
     hovertemplate: hovertemplateAttrs({}, {
         keys: constants.eventDataKeys
     }),
+
     line: {
         color: {
             valType: 'color',
diff --git a/src/traces/scatter/defaults.js b/src/traces/scatter/defaults.js
index 2b18b1c9cbd..0450df06fa9 100644
--- a/src/traces/scatter/defaults.js
+++ b/src/traces/scatter/defaults.js
@@ -26,6 +26,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     if(!traceOut.visible) return;
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     var stackGroupOpts = handleStackDefaults(traceIn, traceOut, layout, coerce);
 
diff --git a/src/traces/scatter3d/attributes.js b/src/traces/scatter3d/attributes.js
index 62567e3ff54..ca9c6c5979d 100644
--- a/src/traces/scatter3d/attributes.js
+++ b/src/traces/scatter3d/attributes.js
@@ -2,6 +2,7 @@
 
 var scatterAttrs = require('../scatter/attributes');
 var colorAttributes = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
 var baseAttrs = require('../../plots/attributes');
@@ -89,6 +90,10 @@ var attrs = module.exports = overrideAll({
     }),
     hovertemplate: hovertemplateAttrs(),
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+
     mode: extendFlat({}, scatterAttrs.mode,  // shouldn't this be on-par with 2D?
         {dflt: 'lines+markers'}),
     surfaceaxis: {
diff --git a/src/traces/scatter3d/defaults.js b/src/traces/scatter3d/defaults.js
index 2cde1d287bc..eb9e130565b 100644
--- a/src/traces/scatter3d/defaults.js
+++ b/src/traces/scatter3d/defaults.js
@@ -24,6 +24,10 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
+    coerce('zhoverformat');
+
     coerce('mode');
 
     if(subTypes.hasLines(traceOut)) {
diff --git a/src/traces/scattergl/attributes.js b/src/traces/scattergl/attributes.js
index ab95dca6118..d69c8b6c349 100644
--- a/src/traces/scattergl/attributes.js
+++ b/src/traces/scattergl/attributes.js
@@ -2,6 +2,7 @@
 
 var baseAttrs = require('../../plots/attributes');
 var scatterAttrs = require('../scatter/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var colorScaleAttrs = require('../../components/colorscale/attributes');
 
 var extendFlat = require('../../lib/extend').extendFlat;
@@ -26,6 +27,8 @@ var attrs = module.exports = overrideAll({
     yperiod0: scatterAttrs.yperiod0,
     xperiodalignment: scatterAttrs.xperiodalignment,
     yperiodalignment: scatterAttrs.yperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     text: scatterAttrs.text,
     hovertext: scatterAttrs.hovertext,
diff --git a/src/traces/scattergl/defaults.js b/src/traces/scattergl/defaults.js
index 01436dad735..b4cce07a5d7 100644
--- a/src/traces/scattergl/defaults.js
+++ b/src/traces/scattergl/defaults.js
@@ -29,6 +29,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     var defaultMode = len < constants.PTS_LINESONLY ? 'lines+markers' : 'lines';
 
diff --git a/src/traces/splom/attributes.js b/src/traces/splom/attributes.js
index 08b9904fb3d..a02947883b9 100644
--- a/src/traces/splom/attributes.js
+++ b/src/traces/splom/attributes.js
@@ -2,6 +2,7 @@
 
 var scatterAttrs = require('../scatter/attributes');
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var scatterGlAttrs = require('../scattergl/attributes');
 var cartesianIdRegex = require('../../plots/cartesian/constants').idRegex;
@@ -130,6 +131,9 @@ module.exports = {
 
     hovertemplate: hovertemplateAttrs(),
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+
     marker: markerAttrs,
 
     xaxes: makeAxesValObject('x'),
diff --git a/src/traces/splom/defaults.js b/src/traces/splom/defaults.js
index 2785c65b314..8e450badf07 100644
--- a/src/traces/splom/defaults.js
+++ b/src/traces/splom/defaults.js
@@ -33,6 +33,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     handleMarkerDefaults(traceIn, traceOut, defaultColor, layout, coerce);
 
diff --git a/src/traces/streamtube/attributes.js b/src/traces/streamtube/attributes.js
index 7bef021ef25..2b7e50f628c 100644
--- a/src/traces/streamtube/attributes.js
+++ b/src/traces/streamtube/attributes.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var mesh3dAttrs = require('../mesh3d/attributes');
 var baseAttrs = require('../../plots/attributes');
@@ -129,6 +130,13 @@ var attrs = {
             'norm', 'divergence'
         ]
     }),
+    uhoverformat: axisHoverFormat('u', 1),
+    vhoverformat: axisHoverFormat('v', 1),
+    whoverformat: axisHoverFormat('w', 1),
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+
     showlegend: extendFlat({}, baseAttrs.showlegend, {dflt: false})
 };
 
diff --git a/src/traces/streamtube/defaults.js b/src/traces/streamtube/defaults.js
index 20018a05d2a..9b5135890f9 100644
--- a/src/traces/streamtube/defaults.js
+++ b/src/traces/streamtube/defaults.js
@@ -47,6 +47,12 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('uhoverformat');
+    coerce('vhoverformat');
+    coerce('whoverformat');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
+    coerce('zhoverformat');
 
     // disable 1D transforms (for now)
     // x/y/z and u/v/w have matching lengths,
diff --git a/src/traces/surface/attributes.js b/src/traces/surface/attributes.js
index 0bccddc80e6..1efb5e18fe2 100644
--- a/src/traces/surface/attributes.js
+++ b/src/traces/surface/attributes.js
@@ -2,6 +2,7 @@
 
 var Color = require('../../components/color');
 var colorScaleAttrs = require('../../components/colorscale/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var baseAttrs = require('../../plots/attributes');
 
@@ -145,6 +146,10 @@ var attrs = module.exports = overrideAll(extendFlat({
     },
     hovertemplate: hovertemplateAttrs(),
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+    zhoverformat: axisHoverFormat('z'),
+
     connectgaps: {
         valType: 'boolean',
         dflt: false,
diff --git a/src/traces/surface/defaults.js b/src/traces/surface/defaults.js
index 63a65137711..3330882bf59 100644
--- a/src/traces/surface/defaults.js
+++ b/src/traces/surface/defaults.js
@@ -72,6 +72,9 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
     coerce('text');
     coerce('hovertext');
     coerce('hovertemplate');
+    coerce('xhoverformat');
+    coerce('yhoverformat');
+    coerce('zhoverformat');
 
     // Coerce remaining properties
     [
diff --git a/src/traces/violin/attributes.js b/src/traces/violin/attributes.js
index 11b8372d13d..a34e5c4dbbc 100644
--- a/src/traces/violin/attributes.js
+++ b/src/traces/violin/attributes.js
@@ -2,6 +2,7 @@
 
 var boxAttrs = require('../box/attributes');
 var extendFlat = require('../../lib/extend').extendFlat;
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 
 module.exports = {
     y: boxAttrs.y,
@@ -9,6 +10,9 @@ module.exports = {
     x0: boxAttrs.x0,
     y0: boxAttrs.y0,
 
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
+
     name: extendFlat({}, boxAttrs.name, {
         description: [
             'Sets the trace name.',
diff --git a/src/traces/violin/hover.js b/src/traces/violin/hover.js
index 4f3c56fb69e..c6e2b27535b 100644
--- a/src/traces/violin/hover.js
+++ b/src/traces/violin/hover.js
@@ -50,7 +50,7 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLay
                 kdePointData[pLetter + '0'] = pOnPath[0];
                 kdePointData[pLetter + '1'] = pOnPath[1];
                 kdePointData[vLetter + '0'] = kdePointData[vLetter + '1'] = vValPx;
-                kdePointData[vLetter + 'Label'] = vLetter + ': ' + Axes.hoverLabelText(vAxis, vVal) + ', ' + cd[0].t.labels.kde + ' ' + kdeVal.toFixed(3);
+                kdePointData[vLetter + 'Label'] = vLetter + ': ' + Axes.hoverLabelText(vAxis, vVal, trace[vLetter + 'hoverformat']) + ', ' + cd[0].t.labels.kde + ' ' + kdeVal.toFixed(3);
 
                 // move the spike to the KDE point
                 kdePointData.spikeDistance = closeBoxData[0].spikeDistance;
diff --git a/src/traces/volume/attributes.js b/src/traces/volume/attributes.js
index 01da4bf507e..95c72146458 100644
--- a/src/traces/volume/attributes.js
+++ b/src/traces/volume/attributes.js
@@ -43,6 +43,10 @@ var attrs = module.exports = overrideAll(extendFlat({
     caps: isosurfaceAttrs.caps,
     text: isosurfaceAttrs.text,
     hovertext: isosurfaceAttrs.hovertext,
+    xhoverformat: isosurfaceAttrs.xhoverformat,
+    yhoverformat: isosurfaceAttrs.yhoverformat,
+    zhoverformat: isosurfaceAttrs.zhoverformat,
+    valuehoverformat: isosurfaceAttrs.valuehoverformat,
     hovertemplate: isosurfaceAttrs.hovertemplate
 },
 
diff --git a/src/traces/waterfall/attributes.js b/src/traces/waterfall/attributes.js
index 83f826c089c..73d7313a7e0 100644
--- a/src/traces/waterfall/attributes.js
+++ b/src/traces/waterfall/attributes.js
@@ -3,6 +3,7 @@
 var barAttrs = require('../bar/attributes');
 var lineAttrs = require('../scatter/attributes').line;
 var baseAttrs = require('../../plots/attributes');
+var axisHoverFormat = require('../../plots/hoverformat_attributes');
 var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
 var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
 var constants = require('./constants');
@@ -73,6 +74,8 @@ module.exports = {
     yperiod0: barAttrs.yperiod0,
     xperiodalignment: barAttrs.xperiodalignment,
     yperiodalignment: barAttrs.yperiodalignment,
+    xhoverformat: axisHoverFormat('x'),
+    yhoverformat: axisHoverFormat('y'),
 
     hovertext: barAttrs.hovertext,
     hovertemplate: hovertemplateAttrs({}, {
diff --git a/src/traces/waterfall/defaults.js b/src/traces/waterfall/defaults.js
index fb5960773b2..4abbd2ebc29 100644
--- a/src/traces/waterfall/defaults.js
+++ b/src/traces/waterfall/defaults.js
@@ -32,6 +32,8 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
     }
 
     handlePeriodDefaults(traceIn, traceOut, layout, coerce);
+    coerce('xhoverformat');
+    coerce('yhoverformat');
 
     coerce('measure');
 
diff --git a/src/traces/waterfall/hover.js b/src/traces/waterfall/hover.js
index 53d36934939..95950200cc4 100644
--- a/src/traces/waterfall/hover.js
+++ b/src/traces/waterfall/hover.js
@@ -18,10 +18,11 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode) {
     var trace = cd[0].trace;
     var isHorizontal = (trace.orientation === 'h');
 
+    var vLetter = isHorizontal ? 'x' : 'y';
     var vAxis = isHorizontal ? pointData.xa : pointData.ya;
 
     function formatNumber(a) {
-        return hoverLabelText(vAxis, a);
+        return hoverLabelText(vAxis, a, trace[vLetter + 'hoverformat']);
     }
 
     // the closest data point
diff --git a/test/jasmine/tests/gl3d_hover_click_test.js b/test/jasmine/tests/gl3d_hover_click_test.js
index c1c7e9504ef..374ade0178c 100644
--- a/test/jasmine/tests/gl3d_hover_click_test.js
+++ b/test/jasmine/tests/gl3d_hover_click_test.js
@@ -1267,3 +1267,162 @@ describe('Test gl3d trace click/hover:', function() {
         });
     });
 });
+
+describe('hover on traces with (x|y|z|u|v|w)hoverformat and valuehoverformat', function() {
+    'use strict';
+
+    var gd, fig;
+
+    beforeEach(function() {
+        gd = createGraphDiv();
+
+        fig = {
+            layout: {
+                hovermode: 'closest',
+                width: 400,
+                height: 400,
+                margin: {
+                    t: 0,
+                    b: 0,
+                    l: 0,
+                    r: 0
+                }
+            }
+        };
+    });
+
+    afterEach(function() {
+        Plotly.purge(gd);
+        destroyGraphDiv();
+    });
+
+    function _hover() {
+        mouseEvent('mouseover', 190, 210);
+    }
+
+    [
+        {type: 'scatter3d', nums: 'x: 0.0\ny: 1.0\nz: 2.0'},
+        {type: 'cone', nums: 'x: 0.0\ny: 1.0\nz: 2.0\nu: 0.0030\nv: 0.00400\nw: 0.005000'},
+        {type: 'streamtube', nums: 'x: 0.0\ny: 1.0\nz: 2.0\nu: 0.0030\nv: 0.00400\nw: 0.005000'},
+    ].forEach(function(t) {
+        it('@gl ' + t.type + ' trace', function(done) {
+            fig.data = [{
+                showscale: false,
+                hoverinfo: 'x+y+z+u+v+w',
+                xhoverformat: '.1f',
+                yhoverformat: '.1f',
+                zhoverformat: '.1f',
+                uhoverformat: '.4f',
+                vhoverformat: '.5f',
+                whoverformat: '.6f',
+                x: [0],
+                y: [1],
+                z: [2],
+                u: [0.003],
+                v: [0.004],
+                w: [0.005]
+            }];
+
+            fig.data[0].type = t.type;
+
+            Plotly.newPlot(gd, fig)
+            .then(delay(20))
+            .then(_hover)
+            .then(delay(20))
+            .then(function() {
+                assertHoverLabelContent({
+                    name: '',
+                    nums: t.nums
+                });
+            })
+            .then(done, done.fail);
+        });
+    });
+
+    it('@gl surface trace', function(done) {
+        fig.data = [{
+            showscale: false,
+            xhoverformat: '.1f',
+            yhoverformat: '.2f',
+            zhoverformat: '.3f',
+            x: [0, 1],
+            y: [0, 1],
+            z: [[1, 0], [0, 1]],
+            type: 'surface'
+        }];
+
+        Plotly.newPlot(gd, fig)
+        .then(delay(20))
+        .then(_hover)
+        .then(delay(20))
+        .then(function() {
+            assertHoverLabelContent({
+                name: '',
+                nums: 'x: 1.0\ny: 1.00\nz: 1.000'
+            });
+        })
+        .then(done, done.fail);
+    });
+
+    it('@gl mesh3d trace', function(done) {
+        fig.data = [{
+            showscale: false,
+            xhoverformat: '.1f',
+            yhoverformat: '.2f',
+            zhoverformat: '.3f',
+            x: [0, 1, 2],
+            y: [1, 2, 0],
+            z: [2, 0, 1],
+            i: [0],
+            j: [1],
+            k: [2],
+            type: 'mesh3d'
+        }];
+
+        Plotly.newPlot(gd, fig)
+        .then(delay(20))
+        .then(_hover)
+        .then(delay(20))
+        .then(function() {
+            assertHoverLabelContent({
+                name: '',
+                nums: 'x: 2.0\ny: 0.00\nz: 1.000'
+            });
+        })
+        .then(done, done.fail);
+    });
+
+    [
+        {type: 'isosurface', nums: 'x: 1.0\ny: 1.00\nz: 1.000\nvalue: 8.0000'},
+        {type: 'volume', nums: 'x: 1.0\ny: 1.00\nz: 1.000\nvalue: 8.0000'},
+    ].forEach(function(t) {
+        it('@gl ' + t.type + ' trace', function(done) {
+            fig.data = [{
+                showscale: false,
+                hoverinfo: 'x+y+z+u+v+w+value',
+                xhoverformat: '.1f',
+                yhoverformat: '.2f',
+                zhoverformat: '.3f',
+                valuehoverformat: '.4f',
+                x: [0, 1, 0, 1, 0, 1, 0, 1],
+                y: [0, 0, 1, 1, 0, 0, 1, 1],
+                z: [0, 0, 0, 0, 1, 1, 1, 1],
+                value: [1, 2, 3, 4, 5, 6, 7, 8]
+            }];
+
+            fig.data[0].type = t.type;
+
+            Plotly.newPlot(gd, fig)
+            .then(delay(20))
+            .then(_hover)
+            .then(delay(20))
+            .then(function() {
+                assertHoverLabelContent({
+                    name: '',
+                    nums: t.nums
+                });
+            })
+            .then(done, done.fail);
+        });
+    });
+});
diff --git a/test/jasmine/tests/hover_label_test.js b/test/jasmine/tests/hover_label_test.js
index 22aee441ae6..559b3744cd1 100644
--- a/test/jasmine/tests/hover_label_test.js
+++ b/test/jasmine/tests/hover_label_test.js
@@ -5086,3 +5086,128 @@ describe('hovermode: (x|y)unified', function() {
             .then(done, done.fail);
     });
 });
+
+describe('hover on traces with (x|y)hoverformat', function() {
+    'use strict';
+
+    var gd, fig;
+
+    beforeEach(function() {
+        gd = createGraphDiv();
+
+        fig = {
+            layout: {
+                hovermode: 'closest',
+                width: 400,
+                height: 400,
+                margin: {
+                    t: 0,
+                    b: 0,
+                    l: 0,
+                    r: 0
+                }
+            }
+        };
+    });
+
+    afterEach(destroyGraphDiv);
+
+    function _hover(x, y) {
+        delete gd._hoverdata;
+        Lib.clearThrottle();
+        mouseEvent('mousemove', x, y);
+    }
+
+    [
+        {type: 'scatter', nums: '(02/01/2000, 1.00)'},
+        {type: 'scattergl', nums: '(02/01/2000, 1.00)'},
+        {type: 'histogram', nums: '(02/01/2000, 1.00)'},
+        {type: 'bar', nums: '(02/01/2000, 1.00)'},
+        {type: 'box', nums: '(02/01/2000, median: 1.00)'},
+        {type: 'ohlc', nums: '02/01/2000\nopen: 4.00\nhigh: 5.00\nlow: 2.00\nclose: 3.00  ▼'},
+        {type: 'candlestick', nums: '02/01/2000\nopen: 4.00\nhigh: 5.00\nlow: 2.00\nclose: 3.00  ▼'},
+        {type: 'waterfall', nums: '(02/01/2000, 1.00)\n1.00 ▲\nInitial: 0.00'},
+        {type: 'funnel', nums: '(02/01/2000, 1.00)\n100% of initial\n100% of previous\n100% of total'},
+    ].forEach(function(t) {
+        it(t.type + ' trace', function(done) {
+            fig.data = [{
+                xhoverformat: '%x',
+                yhoverformat: '.2f',
+                x: ['2000-02'],
+                y: [1],
+                low: [2],
+                high: [5],
+                open: [4],
+                close: [3]
+            }];
+
+            fig.data[0].type = t.type;
+
+            Plotly.newPlot(gd, fig)
+            .then(function() { _hover(200, 200); })
+            .then(function() {
+                assertHoverLabelContent({
+                    name: '',
+                    nums: t.nums
+                });
+            })
+            .then(done, done.fail);
+        });
+    });
+
+    [
+        {type: 'contour', nums: 'x: 02/01/2000\ny: 1.00\nz: 4.000'},
+        {type: 'heatmap', nums: 'x: 02/01/2000\ny: 1.00\nz: 4.000'},
+        {type: 'histogram2d', nums: 'x: 02/01/2000\ny: 1.00\nz: 1.000'},
+        {type: 'histogram2dcontour', nums: 'x: 01/31/2000\ny: 1.00\nz: 1.000'},
+    ].forEach(function(t) {
+        it(t.type + ' trace', function(done) {
+            fig.data = [{
+                xhoverformat: '%x',
+                yhoverformat: '.2f',
+                zhoverformat: '.3f',
+                x: ['2000-01', '2000-02'],
+                y: [1, 1],
+                z: [[1, 2], [3, 4]]
+            }];
+
+            fig.data[0].type = t.type;
+
+            Plotly.newPlot(gd, fig)
+            .then(function() { _hover(200, 200); })
+            .then(function() {
+                assertHoverLabelContent({
+                    name: '',
+                    nums: t.nums
+                });
+            })
+            .then(done, done.fail);
+        });
+    });
+
+    it('splom trace', function(done) {
+        fig.data = [{
+            xhoverformat: '%x',
+            yhoverformat: '.2f',
+            dimensions: [{
+                label: 'A',
+                values: ['2000-01', '2000-02'],
+                type: 'date'
+            }, {
+                label: 'B',
+                values: [3, 4]
+            }],
+            type: 'splom'
+        }];
+
+        Plotly.newPlot(gd, fig)
+        .then(function() { _hover(180, 220); })
+        .then(function() {
+            assertHoverLabelContent({
+                name: '',
+                nums: '(02/01/2000, 4.00)'
+            });
+        })
+        .then(done, done.fail);
+    });
+});