CSS Unit Converter
Convert CSS length values between all common units: px, rem, em, vh, vw, vmin, vmax, pt, cm, mm, in, and pc. Configure the base font size and viewport dimensions for accurate rem/em/viewport conversions.
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Common Use Cases
- Convert px to rem for accessible layouts
- Calculate viewport-relative sizes
- Convert design specs from pt to px
- Build responsive spacing scales
Frequently Asked Questions
Why should I use rem instead of px?
rem units scale with the user's browser font size setting, making your layout accessible to users who increase their default font size. px is absolute and ignores user preferences. 1rem = base font size (default 16px).
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Tool Info
CategoryconversionAI EnhancementNoData StorageZero retention