CSSNumericValue: to() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The to() method of the CSSNumericValue interface converts a numeric value from one unit to another.

Syntax

js
to(unit)

Parameters

unit

The unit to which you want to convert.

Return value

A CSSUnitValue.

Exceptions

SyntaxError DOMException

Thrown if an invalid unit was passed to the method.

TypeError

Thrown if:

  • The CSSNumericValue on which the method is being called can't be resolved to a single value and type. This might occur if the value is calculated from a variable when the value of that variable can't be known in the context.
  • The value can't be converted to the new unit because it's not of the same category. For example, you can't convert meters to seconds.

Examples

Basic usage

js
// Prints "0.608542cm"
console.log(CSS.px("23").to("cm").toString());

Specifications

Specification
CSS Typed OM Level 1
# dom-cssnumericvalue-to

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
to
Chrome – Full support
Chrome 66 (Release date: 2018-04-17)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox 149 (Release date: 2026-03-24)
footnote , disabled
disabled From version 149 users must explicitly set the layout.css.typed-om.enabled preference to true. To change preferences in Firefox, visit about:config.
footnote See bug 1278697
Opera – Full support
Opera 53 (Release date: 2018-05-10)
footnote Full support
Safari – Full support
Safari 16.4 (Release date: 2023-03-27)
footnote Full support
Chrome Android – Full support
Chrome Android 66 (Release date: 2018-04-17)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 47 (Release date: 2018-07-23)
footnote Full support
Safari on iOS – Full support
Safari on iOS 16.4 (Release date: 2023-03-27)
footnote Full support
Samsung Internet – Full support
Samsung Internet 9 (Release date: 2018-09-15)
footnote Full support
WebView Android – Full support
WebView Android 66 (Release date: 2018-04-17)
footnote Full support
WebView on iOS – Full support
WebView on iOS 16.4 (Release date: 2023-03-27)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
See implementation notes.
User must explicitly enable this feature.