How to use it
- Enter the pixel measurement.
- Confirm the root base font size, which defaults to 16px.
- Copy the calculated rem value.
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Convert pixels to rem using your document base font size.
24px ÷ 16px = 1.5rem
Translate an absolute pixel measurement into a root-relative rem value for CSS planning.
rem = pixels ÷ base font size.
24px divided by a 16px base equals 1.5rem.
The rendered size depends on the document root font size and user/browser settings.