CSS UNIT CONVERTER

px, rem, em, pt — converted instantly.

Type a value in any unit and see it converted to the others.

Base font size (root, for rem)

px

Parent font size (for em)

px

How these units relate

Pixels are absolute. Rem is relative to the root (html) font size, which defaults to 16px in most browsers. Em is relative to the parent element's font size. Points are a print unit, at 96px = 72pt, so 1pt = 4/3px.