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PX to REM Converter

Convert between pixels and rem units for responsive CSS design.

pixels (px)
↔
rem

Quick Reference Table

PixelsREMCSS

Batch Convert

Why use rem units?

REM (root em) units are relative to the root element's font size, making them ideal for responsive design. Unlike pixels, rem units scale with user preferences and browser settings, improving accessibility. The default base font size in browsers is 16px, so 1rem = 16px by default.