CSS Unit Converter

Convert between CSS units: px, rem, em, vw, vh, pt, cm, mm with custom root font size and viewport.

Settings

Root Font Size

Parent Font Size

Viewport Width

Viewport Height

Presets

rem

Reference

1 rem = 16 px (root: 16px)1 em = 16 px (parent: 16px)1 vw = 14.4 px (vp: 1440px)1 vh = 9 px (vp: 900px)1 pt = 1.33333 px1 cm = 37.7953 px