JavaScript (ES2026) reference · Math Methods and Constants

JavaScript Math.cbrt() Method

Return the cube root of a number; unlike Math.pow(x, 1/3) it works for negative numbers.

JavaScript (ES2026) Since ES2015

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Syntax

Math.cbrt(x)

Parameter	Description
`x`	A number.

A number.

Cube rootsTry it yourself

console.log(Math.cbrt(27), Math.cbrt(-8));

Output

3 -2

pow() returns NaN for negativesTry it yourself

console.log(Math.pow(-8, 1 / 3), Math.cbrt(-8));

Output

NaN -2

Version	Change
JavaScript ES2015	Added

Math.sqrt() · Return the square root of a number, or NaN for negative numbers. Use it for distances and the Pythagorean theorem.
Math.pow() · Return a base raised to an exponent. The ** operator does the same: Math.pow(2, 10) equals 2 ** 10.
JavaScript Math · tutorial
JavaScript Numbers · tutorial