JavaScript (ES2026) reference · Math Methods and Constants

JavaScript Math.PI Property

The ratio of a circle's circumference to its diameter, approximately 3.14159.

JavaScript (ES2026) Since ES1

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Syntax

Math.PI

3.141592653589793

The valueTry it yourself

console.log(Math.PI);

Output

3.141592653589793

Circle area and circumferenceTry it yourself

const r = 2;
console.log((Math.PI * r ** 2).toFixed(2), (2 * Math.PI * r).toFixed(2));

Output

12.57 12.57

Version	Change
JavaScript ES1	Added

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