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Math.round()

Math.round(x)

Rounds to the nearest integer. An exact half (x.5) is rounded up – towards plus infinity.

Parameters

x – a number.

Return value

An integer.

Examples

console.log(Math.round(2.4), Math.round(2.5), Math.round(-2.5), Math.round(-2.6));
const price = 14.7943;
console.log(Math.round(price * 100) / 100);
console.log(Math.round(1.005 * 100) / 100, Math.round((1.005 + Number.EPSILON) * 100) / 100);

Output:

2 3 -2 -3
14.79
1 1.01

Things to watch out for

A half of a negative number goes towards zero: Math.round(-2.5) is -2 (toFixed() gives -3).
Rounding to decimal places with * 100 / 100 suffers from the inexactness of decimal numbers (1.005 → 1). For money calculate in cents.
To output a number with a given number of decimal places toFixed() or toLocaleString() is more suitable.

Browser support

Baseline – widely available: works in all major browsers and has for a long time (since 2015 at the latest). Since version: Chrome 1, Firefox 1, Safari 1; Node.js 0.10.0. As of October 2026 (MDN browser-compat-data).