CSS unit converter
Convert between px, rem, em, pt, %, vw, vh, and ch. Tweak root font size, parent length, and viewport size to re-anchor every row. Runs locally in your browser.
Input
Enter a value and pick its unit. The output below shows it expressed in every other unit under the current context.
CSS pixel — the universal pivot. 1/96 inch since CSS Values 3.
Context
Knobs that anchor the relative units. Defaults match the UA stylesheet (16px root + parent font, 1000px parent length) and a typical desktop viewport (1280 × 800).
Anchors rem.
Anchors em + ch.
Anchors %.
Anchors vw.
Anchors vh.
Conversions
Enter a numeric value above to convert.