px to rem converter
Convert px to rem for any base font size. The output updates as you type, with a reference table covering common values.
Try 16, 24, 1.5
Updates as you type
Default 16px — change to match your project.
How to use this tool
- 1Enter the px value you want to convert.
- 2Set your project’s base font size (defaults to 16px).
- 3Read the rem equivalent and copy it for your stylesheet.
About this tool
Pixels are absolute; rem values scale with the user’s root font size, which is why design systems and accessibility-conscious sites prefer rem for spacing and typography. The default browser root is 16px, so 1rem = 16px unless you’ve changed it.
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Frequently asked questions
Short answers to what people ask most.
What base font size does this converter use?
Why use rem instead of px?
Is the conversion exact?
Does this work offline?
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