PX to REM Converter
Quickly swap between pixels and REM units for accessible typography. Adjust the base size to fit your root CSS.
Base Font Size
The font-size applied to the `<html>` root element.
Common Scale
Why use REMs instead of Pixels?
REMs (Root EM) scale based on the user's browser-level font size preferences. If a visually impaired user increases their default font size from 16px to 24px, your entire design scales proportionately. Hardcoded pixels break accessibility.
How is this calculated?
The formula to calculate REM is: Target PX / Base Size = REM
For example, if your base size is 16px, converting 24px is simply 24 / 16 = 1.5rem. By keeping your root font-size at 100%, you respect the user's OS choices.
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