cap unit

The cap CSS length unit corresponds to the height of Latin capital letters.

Baseline Status: Achieved Widely Available on Jun 11, 2026 (Cross-browser Newly Available since Dec 11, 2023).

Desktop Browser Engine Support

Google Chrome

118

Supported

Mozilla Firefox

97

Supported

Apple Safari

17.2

Supported

Microsoft Edge

118

Supported

Mobile Browser Engine Support

Chrome Android

118

Firefox Android

97

Safari iOS

17.2

Specifications and References

MDN Browser Compat Data Keys: