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REM to PX Converter

Convert rem units back to pixels for any root font size.

Enter values

Results update as you type.

Result

In pixels

24 px

CSS value
24px
Rounded to the nearest pixel
24 px
At a 10px root
15 px
At a 20px root
30 px

Common values at a 16px root

REMPixels
0.25rem4px
0.5rem8px
0.75rem12px
1rem16px
1.25rem20px
1.5rem24px
2rem32px
2.5rem40px
3rem48px
4rem64px

About the REM to PX Converter

Convert rem units back to pixels for any root font size.

Also known as: rem to pixel, rem px converter, css rem to px.

How to use this calculator

  1. Enter rem, root font size.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

pixels = rem × root font size

Worked example

Using the values pre-filled in the calculator above:

  • REM = 1.5 rem
  • Root font size = 16 px

the calculator returns:

  • In pixels: 24 px
  • CSS value: 24px
  • Rounded to the nearest pixel: 24 px
  • At a 10px root: 15 px