About the CSS PX-REM Converter
The CSS PX-REM Converter applies the document root font size explicitly, making the relationship between fixed CSS pixels and scalable rem units easy to audit.
How to use the CSS PX-REM Converter
- Enter the measurement.
- Choose the conversion direction.
- Set the actual root font size and calculate.
Practical tips
- Browsers commonly default to 16px, but a site stylesheet can change it.
- Round only as much as your design system requires.