<angle>

Summary

The <angle> CSS data type represents angle values. Positive angles represent right angles, negative angles represent left angles. Its syntax is a <number> data type immediately followed by the unit (deg, grad, rad or turn). Like for any CSS dimension, there is no space between the unit literal and the number.

For static properties and a given unit, an angle can be represented by several values: 90deg and -270deg, or 1turn and 4turn represents the same final position. For dynamic properties, like applying a transition on the transform property, the effect will nevertheless be different.

The following units may be used:

  • deg which represents an angle in degrees. One full circle is 360deg. E.g. 0deg, 90deg, 360deg.
  • grad which represents an angle in gradians. One full circle is 400grad. E.g. 0grad, 100grad, 400grad.
  • rad which represents an angle in radians.  One full circle is 2π radians which approximates to 6.2832rad. 1rad is 180/π degrees. E.g. 0rad, 1.0708rad, 6.2832rad.
  • turn which represents the number of turns the angle is. One full circle is 1turn. E.g. 0turn, 0.25turn, 1turn.

Even if all units represent the same time for the value 0, the unit may not be omitted in that case as it isn't a <length>: 0 is invalid and does not represent 0deg, 0grad, 0rad or 0turn.

Examples

Angle90.png

A right angle: 90deg = 100grad = 0.25turn 1.5708rad

Angle180.png A flat angle: 180deg = 200grad = 0.5turn 3.1416rad
AngleMinus90.png A right angle (towards the left): -90deg = -100grad = -0.25turn -1.5708rad
Angle0.png

A null angle: 0deg = 0grad = 0turn = 0rad

Note: 0 is not a valid angle value.

Specifications

Specification Status Comment
CSS Values and Units Module Level 3 Candidate Recommendation  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 2 (528.17) 3.6 (1.9.2) 9.0 Not supported 4.0 (528.17)
turn unit Not supported 13.0 9.0 Not supported Not supported
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? (Yes) ? Not supported ?
turn unit Not supported 13.0 ? Not supported Not supported

 

Attachments

File Size Date Attached by
Angle90.png
37932 bytes 2011-10-01 10:02:13 teoli
Angle180.png
38606 bytes 2011-10-01 10:08:01 teoli
AngleMinus90.png
38598 bytes 2011-10-01 10:26:20 teoli
Angle0.png
37266 bytes 2011-10-01 10:33:20 teoli
color-picker-gradient
66665 bytes 2013-07-26 06:25:46 gabriel_ivanica

Document Tags and Contributors

Last updated by: teoli,
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