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The HTMLCanvasElement.height property is a positive integer reflecting the height HTML attribute of the <canvas> element interpreted in CSS pixels. When the attribute is not specified, or if it is set to an invalid value, like a negative, the default value of 150 is used.

This is one of the two properties, the other being HTMLCanvasElement.width, that controls the size of the canvas.


var pxl = canvas.height;
canvas.height = pxl;


Given this <canvas> element:

<canvas id="canvas" width="300" height="300"></canvas>

You can get the height of the canvas with the following code:

var canvas = document.getElementById('canvas');
console.log(canvas.height); // 300


Specification Status Comment
HTML Living Standard
The definition of 'HTMLCanvasElement.height' in that specification.
Living Standard No change since the latest snapshot, HTML5
HTML 5.1
The definition of 'HTMLCanvasElement.height' in that specification.
The definition of 'HTMLCanvasElement.height' in that specification.
Recommendation Snapshot of the HTML Living Standard containing the initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4 Yes3.6993.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes ?

See also

Document Tags and Contributors

 Contributors to this page: fscholz, nmve, erikadoyle, Nexii, teoli
 Last updated by: fscholz,