Math.PI
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.
TheMath.PI static data property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159.
Try it
function calculateCircumference(radius) { return 2 * Math.PI * radius;}console.log(Math.PI);// Expected output: 3.141592653589793console.log(calculateCircumference(10));// Expected output: 62.83185307179586Value
Property attributes ofMath.PI | |
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | no |
Description
BecausePI is a static property ofMath, you always use it asMath.PI, rather than as a property of aMath object you created (Math is not a constructor).
Examples
Using Math.PI
The following function usesMath.PI to calculate the circumference of a circle with a passed radius.
js
function calculateCircumference(radius) { return Math.PI * (radius + radius);}calculateCircumference(1); // 6.283185307179586Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-math.pi |