CSS Unit Converter — px, rem, em, vw, vh, pt, %
Convert CSS units between px, rem, em, vw, vh, pt, and percentage. Configure root font-size and viewport dimensions for accurate conversions.
Settings
Converted Values
Click any row to use that value as the new input.
Common Presets
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- Enter a value and select the source unit
- Set root font-size (default 16px)
- Set viewport dimensions if using vw/vh
- See all conversions instantly
- Copy any converted value
Use Cases
- Converting px designs to rem
- Responsive design calculations
- Understanding relative units
- Design system unit standardization