PX to REM Converter

Summary

Convert any pixel value to rem (or rem to px) instantly, with a configurable root font size and a bulk reference table.

How it works

1. Set the root font size (default 16px) to match your project.
2. Enter a pixel value in the PX field — the REM equivalent appears instantly.
3. Or enter a REM value in the REM field to convert back to pixels.
4. Use the bulk table to see common pixel sizes and their rem equivalents at a glance.
5. Copy any result with one click.

Use cases

• Convert design specs (px) to rem for scalable, accessible CSS.
• Check what px value a rem unit maps to when debugging layouts.
• Generate a rem reference table to paste into a project style guide.
• Verify font-size, padding, and margin values match your design tokens.
• Quickly test how a custom root size affects every spacing value.

Frequently Asked Questions