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PX to REM converter

Paste one or many values separated by commas, spaces or new lines. Numbers without a unit are treated as px.

Runs locally — nothing is uploaded
Result
Enter pixel values.

How to use

  1. 1Paste values such as 12, 14, 16px or 1.5rem.
  2. 2Set the root font size if your site changes it (the browser default is 16px).
  3. 3Copy the table or the list of conversions.

Divide the pixel value by the root font size: 24px ÷ 16 = 1.5rem. For rem to px, multiply.

rem scales with the user's browser font size setting, which helps people who need larger text. px stays fixed.

em is relative to the parent element's font size, which can differ from the root. This tool treats em like rem, so check nested elements yourself.

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