PX to REM Converter

Convert pixels (PX) to REM and EM CSS units based on custom root base font size (default 16px).

Root Base Font Size (HTML 1rem)

Pixels (PX)

REM (rem)

rem

Common CSS Unit Reference Sheet (Base: 16px)

Overview

What this tool does

Convert pixels (PX) to REM and EM CSS units based on customizable root base font sizes.

100% private in-browser processing. Zero cloud uploads.

Tutorial

How to use it

1Set your root HTML base font size (default 16px).
2Enter a pixel value to get exact REM output or vice-versa.
3Copy values from the interactive CSS cheat-sheet.

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