CSS Unit Converter

Convert between px, rem, em, and viewport units instantly.

Base font size: px

Viewport: × px

Converted Values (click to copy)

Visual Preview

16px

Common Values

Unit Reference

px: Absolute pixel unit
rem: Relative to root font-size (html)
em: Relative to parent font-size
pt: Point (1pt = 1/72 inch, 1px ≈ 0.75pt)
%: Percentage of parent element
vw/vh: 1% of viewport width/height