px to rem

Convert pixels to rem units instantly — set your base font size and see the exact rem value for any pixel measurement

16px ÷ 16 = 1 rem
Result
1 rem

base: 16px

px16rem116px = 1rem

About this calculator

The rem unit (root em) is relative to the root element's font size — usually 16px by default in browsers. Converting px to rem makes your CSS scalable: if a user changes their browser font size, rem-based layouts adapt automatically. Use this tool to find the rem equivalent of any pixel value for any base font size.

Common examples

  • 16px = 1rem (base 16px)
  • 24px = 1.5rem (base 16px)
  • 32px = 2rem (base 16px)
  • 12px = 0.75rem (base 16px)
  • 18px = 1.125rem (base 16px)