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PX ↔ REM Converter

Convert CSS units px ⇄ rem/em based on the root font size (default 16px).

Convert between px and rem based on a base font size (default 16px) - handy for responsive CSS.

How to use PX ↔ REM

  1. Enter a value in px or rem.
  2. Set the base font size if it's different from 16.
  3. View the converted value.

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🔒 PX ↔ REM Converter runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See145 free dev tools more.