100% Free CSS Developer Utility

Free PX to REM Converter

Convert pixel measurements to CSS REM units based on custom root font sizes.

How to Use Instructions:

  1. Enter your target pixel value in the Pixels (PX) input field.
  2. Set your project's root font size in Base Font Size (PX) (default is 16px).
  3. Copy the automatically calculated REM value displayed in the result box below.
Calculated Value