Number.MAX_VALUE

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.

The Number.MAX_VALUE static data property represents the maximum numeric value representable in JavaScript.

Try it

function multiply(x, y) { if (x * y > Number.MAX_VALUE) { return "Process as Infinity"; } return x * y; } console.log(multiply(1.7976931348623157e308, 1)); // Expected output: 1.7976931348623157e+308 console.log(multiply(1.7976931348623157e308, 2)); // Expected output: "Process as Infinity"

Value

2¹⁰²⁴ - 2⁹⁷¹, or approximately 1.7976931348623157E+308.

Property attributes of `Number.MAX_VALUE`
Writable	no
Enumerable	no
Configurable	no

Description

Values larger than MAX_VALUE are represented as Infinity and will lose their actual value.

Because MAX_VALUE is a static property of Number, you always use it as Number.MAX_VALUE, rather than as a property of a number value.

Examples

Using MAX_VALUE

The following code multiplies two numeric values. If the result is less than or equal to MAX_VALUE, the func1 function is called; otherwise, the func2 function is called.

if (num1 * num2 <= Number.MAX_VALUE) { func1(); } else { func2(); }

Specifications

Specification
ECMAScript® 2026 Language Specification # sec-number.max_value