PX to REM Converter

Convert pixel values to scalable REM units for responsive, accessible CSS. Bulk convert with a custom base font size.

Base Font Size (px)

PX Values (one per line)

Results

Why Use REM Instead of PX?

REM (root em) units are relative to the root element font size, making your design scalable and accessible. When users change their browser font size, REM-based layouts adapt automatically. The standard base font size is 16px, so 1rem = 16px by default. Use this tool to bulk-convert your design tokens from pixels to REM.