REM to PX Converter
Convert REM, PX, EM, percent and point units instantly with configurable base font size.
REM to PX Converter
Convert between rem and px instantly using a custom base font size. This tool also shows equivalent values in em, %, and pt, so you can compare units before updating your CSS. For other unit conversions, try the Area Converter or the Decimal to Octal Converter.
Use rem when you want scalable typography based on root font size. Use px when you need fixed-size control. Edit either input field and the converter recalculates in real time.
Frequently Asked Questions
What is 1rem in pixels?
With a default base size of 16px, 1rem = 16px. If base size is 18px, then 1rem = 18px.
Why use rem instead of px?
Rem units scale with root font size, which helps accessibility and responsive design.
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