CSS <length> Data Type
Description
The <length>
CSS data type that is used to specify distance measurements using relative or absolute units. It consists of an integer or decimal number followed (without whitespace) by a unit abbreviation; the unit may be omitted if the number is zero (0). Lengths can be used in numerous CSS properties, such as width, height, margin, padding, font-size, and text-shadow.
Syntax
property: <length>
Values
Absolute lengths:- cm and mmSpecify centimetres and millimetres.
- inSpecify inches.
- pcSpecify picas, 6 per inch.
- ptSpecify points, 72 per inch.
- pxSpecify pixels, 96 per inch. These are often referred to as CSS pixels, and do not necessarily correspond to the device's resolution.
- emunits equal the point size (nominal height) of the current font. This is historically based on the mechanical typeset width of the (square) letter "M".
- remEqual the em size for the document root (usually html)
- exSpecify the height of the letter "x" in the current font, the general height of lowercase letters without ascenders.
- chSpecify the width of the numeral "0" in the current font, which is roughly the average for most text characters.
- vwSpecify a percentage of the width of the current viewport, e.g., the window.
- vhSpecify a percentage of current viewport’s height.
- vmax and vminspecify the maximum or minimum of the viewport's width or height.
Example
<p class="box">Example of the length CSS data type.</p>
.box {
border: 2px solid purple;
padding: 10px;
position: fixed;
top: 0.5in;
right: 2em;
width: 25%;
width: 25vw;
}
Browser Support
Desktop | |||||
3 | 12 | 1 | 1 | 3.5 | 1 |
Tablets / Mobile | |||||
![]() |
|||||
≤37 | 18 | 4 | 10.1 | 1 | 1.0 |
Last updated by CSSPortal on: 9th December 2019
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