Math.atanh()
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.atanh()
static method returns the inverse hyperbolic tangent of a number. That is,
Try it
console.log(Math.atanh(-1));
// Expected output: -Infinity
console.log(Math.atanh(0));
// Expected output: 0
console.log(Math.atanh(0.5));
// Expected output: 0.549306144334055 (approximately)
console.log(Math.atanh(1));
// Expected output: Infinity
Syntax
js
Math.atanh(x)
Parameters
x
-
A number between -1 and 1, inclusive.
Return value
Description
Because atanh()
is a static method of Math
, you always use it as Math.atanh()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Using Math.atanh()
js
Math.atanh(-2); // NaN
Math.atanh(-1); // -Infinity
Math.atanh(-0); // -0
Math.atanh(0); // 0
Math.atanh(0.5); // 0.5493061443340548
Math.atanh(1); // Infinity
Math.atanh(2); // NaN
Specifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-math.atanh |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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atanh |
Legend
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- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.