Pixel to REM Converter
Convert between pixels and REM units with configurable base font size. Shows conversion formula.
How to Use Pixel to REM Converter
The Pixel to REM Converter is a free online tool for converting between pixel (px) and REM CSS units. REM units are relative to the root font size, making them essential for responsive web design. Enter a pixel value and get the equivalent REM value, or switch to REM-to-pixel mode for the reverse conversion. The default base font size is 16px (browser default), but you can customize it to match your project settings. The conversion formula is displayed for reference. Essential for front-end developers building responsive layouts, designers converting mockup measurements to CSS, and anyone working with relative units in web development.
Step-by-Step Instructions
- Select conversion direction (px to rem or rem to px)
- Enter the value you want to convert
- Optionally adjust the base font size if your project uses a non-standard root size
- View the converted value with formula and copy it
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