Web/API/CanvasRenderingContext2D/measureText

The CanvasRenderingContext2D.measureText() method returns a TextMetrics object that contains information about the measured text (such as its width, for example).

Syntax

ctx.measureText(text);

Parameters

text: The text String to measure.

Return value

A TextMetrics object.

Example

Given this <canvas> element:

<canvas id="canvas"></canvas>

... you can get a TextMetrics object using the following code:

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let text = ctx.measureText('Hello world');
console.log(text.width);  // 56;

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'CanvasRenderingContext2D.measureText' in that specification.	Living Standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`measureText`	Chrome Full support Yes	Edge Full support 12	Firefox Full support 2	IE Full support 9	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 4	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support: Full support