Web/CSS/number

The <number> CSS data type represents a number, being either an integer or a number with a fractional component.

Syntax

The syntax of <number> extends the syntax of <integer>. A fractional value is represented by a . followed by one or more decimal digits, and may be appended to an integer. There is no unit associated with numbers.

Interpolation

When animated, values of the <number> CSS data type are interpolated as real, floating-point numbers. The speed of the interpolation is determined by the timing function associated with the animation.

Examples

Valid numbers

12          A raw <integer> is also a <number>.
4.01        Positive fraction
-456.8      Negative fraction
0.0         Zero
+0.0        Zero, with a leading +
-0.0        Zero, with a leading -
.60         Fractional number without a leading zero
10e3        Scientific notation
-3.4e-2     Complicated scientific notation

Invalid numbers

12.         Decimal points must be followed by at least one digit.
+-12.2      Only one leading +/- is allowed.
12.1.1      Only one decimal point is allowed.

Specifications

Specification	Status	Comment
CSS Values and Units Module Level 4The definition of '<number>' in that specification.	Editor's Draft	No significant change.
CSS Values and Units Module Level 3The definition of '<number>' in that specification.	Candidate Recommendation	No significant change.
CSS Level 2 (Revision 1)The definition of '<number>' in that specification.	Recommendation	Explicit definition.
CSS Level 1The definition of '<number>' in that specification.	Recommendation	Implicit definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
<number>	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 5	Opera Full support 2	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
Scientific notation	Chrome Full support 43	Edge Full support 12	Firefox Full support 29	IE Full support 11	Opera Full support 30	Safari Full support 10.1	WebView Android Full support 43	Chrome Android Full support 43	Firefox Android Full support 29	Opera Android Full support 30	Safari iOS Full support 10.3	Samsung Internet Android Full support 4.0

Legend

Full support: Full support