PX to REM Converter
Converts pixels into REM units based on a base font size.
Lilu Baba's PX to REM Converter converts pixel values into CSS REM units using your chosen root font size — handy for building scalable, accessible stylesheets.
How to use this calculator
- Enter the pixel value.
- Enter the root font size (default browser value is 16px).
- The REM equivalent updates instantly.
REM
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FAQ
PX to REM Converter — frequently asked questions
REM units scale with the user's font size preferences, making layouts more accessible and easier to resize consistently.
Most browsers default to 16px unless the site or user has changed it.