Pixel to REM Converter

Convert pixels to REM and REM to pixels online. Free PX to REM converter for frontend developers.

Base font size:px

Pixels (px)

REM

rem

16px=1rem(base: 16px)

Common Conversions

What is REM?

REM (Root EM) is a CSS unit relative to the root element's font size. Unlike pixels, REM values scale with the user's browser settings, making them ideal for accessible, responsive designs. Most browsers default to a 16px base font size, so 1rem = 16px.

Why Use REM Instead of Pixels?

Using REM units ensures your design respects user preferences for text size. This improves accessibility for users who increase their default font size. REM also makes it easier to create consistent spacing and typography scales. Modern CSS frameworks like Tailwind CSS use REM-based spacing by default.