Math.SQRT2

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The Math.SQRT2 static data property represents the square root of 2, approximately 1.414.

Try it

function getRoot2() {
  return Math.SQRT2;
}

console.log(getRoot2());
// Expected output: 1.4142135623730951

Value

\mathtt{Math.SQRT2} = \sqrt{2} \approx 1.414

Property attributes of `Math.SQRT2`
Writable	no
Enumerable	no
Configurable	no

Description

Math.SQRT2 is a constant and a more performant equivalent to Math.sqrt(2).

Because SQRT2 is a static property of Math, you always use it as Math.SQRT2, rather than as a property of a Math object you created (Math is not a constructor).

Examples

Using Math.SQRT2

The following function returns the square root of 2:

function getRoot2() {
  return Math.SQRT2;
}

getRoot2(); // 1.4142135623730951

Specifications

Specification
ECMAScript® 2026 Language Specification # sec-math.sqrt2

Browser compatibility

	Desktop					Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`SQRT2`	1	12	1	3	1	18	4	10.1	1	1.0	4.4	1.0	0.10.0