Intl.NumberFormat

The Intl.NumberFormat object is a constructor for objects that enable language sensitive number formatting.

Constructor

Intl.NumberFormat()
Creates a new NumberFormat object.

Properties

Intl.NumberFormat.prototype
Allows the addition of properties to all objects.

Methods

Intl.NumberFormat.supportedLocalesOf()
Returns an array containing those of the provided locales that are supported without having to fall back to the runtime's default locale.

NumberFormat instances

Properties

NumberFormat instances inherit the following properties from their prototype:

Intl.NumberFormat.prototype.constructor
A reference to Intl.NumberFormat.

Methods

NumberFormat instances inherit the following methods from their prototype:

Intl.NumberFormat.prototype.format()
Getter function that formats a number according to the locale and formatting options of this NumberFormat object.
Intl.NumberFormat.prototype.formatToParts()
Returns an Array of objects representing the number string in parts that can be used for custom locale-aware formatting.
Intl.NumberFormat.prototype.resolvedOptions()
Returns a new object with properties reflecting the locale and collation options computed during initialization of the object.

Examples

Basic usage

In basic use without specifying a locale, a formatted string in the default locale and with default options is returned.

var number = 3500;

console.log(new Intl.NumberFormat().format(number));
// → '3,500' if in US English locale

Using locales

This example shows some of the variations in localized number formats. In order to get the format of the language used in the user interface of your application, make sure to specify that language (and possibly some fallback languages) using the locales argument:

var number = 123456.789;

// German uses comma as decimal separator and period for thousands
console.log(new Intl.NumberFormat('de-DE').format(number));
// → 123.456,789

// Arabic in most Arabic speaking countries uses real Arabic digits
console.log(new Intl.NumberFormat('ar-EG').format(number));
// → ١٢٣٤٥٦٫٧٨٩

// India uses thousands/lakh/crore separators
console.log(new Intl.NumberFormat('en-IN').format(number));
// → 1,23,456.789

// the nu extension key requests a numbering system, e.g. Chinese decimal
console.log(new Intl.NumberFormat('zh-Hans-CN-u-nu-hanidec').format(number));
// → 一二三,四五六.七八九

// when requesting a language that may not be supported, such as
// Balinese, include a fallback language, in this case Indonesian
console.log(new Intl.NumberFormat(['ban', 'id']).format(number));
// → 123.456,789

Using options

The results can be customized using the options argument:

var number = 123456.789;

// request a currency format
console.log(new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(number));
// → 123.456,79 €

// the Japanese yen doesn't use a minor unit
console.log(new Intl.NumberFormat('ja-JP', { style: 'currency', currency: 'JPY' }).format(number));
// → ¥123,457

// limit to three significant digits
console.log(new Intl.NumberFormat('en-IN', { maximumSignificantDigits: 3 }).format(number));
// → 1,23,000

Using style and unit

console.log(new Intl.NumberFormat("pt-PT",  {
    style: 'unit',
    unit: "mile-per-hour"
}).format(50));
// → 50 mi/h

console.log((16).toLocaleString('en-GB', {
    style: "unit",
    unit: "liter",
    unitDisplay: "long"
}));
// → 16 litres

Using notation

console.log(new Intl.NumberFormat('en-US', { notation: "scientific" }).format(987654321));
// → 9.877E8

console.log(new Intl.NumberFormat('pt-PT', { notation: "scientific" }).format(987654321));
// → 9,877E8

console.log(new Intl.NumberFormat('en-GB', { notation: "engineering" }).format(987654321));
// → 987.654E6

console.log(new Intl.NumberFormat('de', { notation: "engineering" }).format(987654321));
// → 987,654E6

console.log(new Intl.NumberFormat('zh-CN', { notation: "compact" }).format(987654321)); 
// → 9.9亿

console.log(new Intl.NumberFormat('fr', { notation: "compact" , compactDisplay: "long" }).format(987654321)); 
// → 988 millions

console.log(new Intl.NumberFormat('en-GB', { notation: "compact" , compactDisplay: "short" }).format(987654321));
// → 988M

Specifications

Specification
ECMAScript Internationalization API 4.0 (ECMA-402)
The definition of 'Intl.NumberFormat' in that specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
NumberFormatChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support ≤37Chrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs ?
NumberFormat() constructorChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support ≤37Chrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs ?
formatChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support ≤37Chrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs ?
formatToParts
Experimental
Chrome Full support 64Edge Full support 12Firefox Full support 58IE Full support 11Opera Full support 51Safari Full support 13WebView Android Full support 64Chrome Android Full support 64Firefox Android Full support 58Opera Android Full support 47Safari iOS Full support 13Samsung Internet Android Full support 9.0nodejs ?
resolvedOptionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support ≤37Chrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs ?
supportedLocalesOfChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support ≤37Chrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also