CSS Unit Converter
Convert CSS units between px, rem, em, pt, mm, cm, and inches. Essential for responsive design.
Local processing How to Use
Enter your input above. Results update automatically as you type. Use the download button to save the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
What is the base font size?
We use 16px as the default root font size for rem/em calculations.
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