Unit Converter (Pixels to REM)
Convert between px and rem with a configurable base font size.
About Unit Converter (Pixels to REM)
Converting between pixels and rem keeps your layout consistent and accessible. Our unit converter lets you enter a value in pixels and get the equivalent in rem, or the other way around, using a base font size you can set (default 16px). Handy when you’re moving from a design in px to a stylesheet that uses rem, or when tuning responsive typography. Enter a number, adjust the base if needed, and copy the result. All calculation is done in your browser. No sign-up, no limits. A quick, reliable way to switch between px and rem.
How to use Unit Converter (Pixels to REM)
Enter a pixel value to get rem, or a rem value to get pixels. Set the base font size (default 16px) to match your CSS.
Related guides for Unit Converter (Pixels to REM)
Pro tips for Unit Converter (Pixels to REM)
- Enter a pixel value to get rem, or a rem value to get pixels.
- All processing runs in your browser—your input is not uploaded to our servers.
- Bookmark this page if you use this tool often.
FAQs about Unit Converter (Pixels to REM)
What is rem?
rem is a CSS unit relative to the root font size. 1rem is usually 16px if the root font size is 16px.
Why convert px to rem?
Using rem helps with accessibility and consistent scaling when users change their default font size.
Can I change the base font size?
Yes. Set the base (e.g. 16px) to match your project’s root font size for accurate conversion.
Does it support other units?
This tool focuses on px and rem. Other converters exist for em, pt, or viewport units.