Math.ceil()
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.
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The Math.ceil() static method always rounds up and returns the smallest integer greater than or equal to a given number.
Try it
console.log(Math.ceil(0.95));
// Expected output: 1
console.log(Math.ceil(4));
// Expected output: 4
console.log(Math.ceil(7.004));
// Expected output: 8
console.log(Math.ceil(-7.004));
// Expected output: -7
Syntax
js
Math.ceil(x)
Parameters
x-
A number.
Return value
The smallest integer greater than or equal to x. It's the same value as -Math.floor(-x).
Description
Because ceil() is a static method of Math, you always use it as Math.ceil(), rather than as a method of a Math object you created (Math is not a constructor).
Examples
Using Math.ceil()
js
Math.ceil(-Infinity); // -Infinity
Math.ceil(-7.004); // -7
Math.ceil(-4); // -4
Math.ceil(-0.95); // -0
Math.ceil(-0); // -0
Math.ceil(0); // 0
Math.ceil(0.95); // 1
Math.ceil(4); // 4
Math.ceil(7.004); // 8
Math.ceil(Infinity); // Infinity
Specifications
| Specification |
|---|
| ECMAScript® 2025 Language Specification # sec-math.ceil |