Newly Available
Units
id: rch
rch unit
The
rch CSS length unit is a font-relative length equal to the value of the ch unit on the root element. ch length is based on the width of the zero (0) character.
Baseline Status:
Achieved Newly Available on Jan 13, 2026 across core engines.
Desktop Browser Engine Support
Google Chrome
111
Supported
Mozilla Firefox
147
Supported
Apple Safari
17.2
Supported
Microsoft Edge
111
Supported
Mobile Browser Engine Support
Chrome Android
111
Firefox Android
147
Safari iOS
17.2
Specifications and References
MDN Browser Compat Data Keys: