Pixel Converter

Convert between px, rem, and em using the browser's base font size. Update any field to see the other units adjust instantly.

Measurement

Choose a value and unit, then set the root font size (typically 16px) to update the conversions.

Value

Unit

Root font size (px)

Most browsers default to 16px. Adjust this if the site uses a different root size.

Converted Values

Results update automatically as you type.

Pixels (px)

16 px

Root em (rem)

1 rem

Relative em (em)

1 em

With a root font size of 16px: 1rem = 16px and 1em = 16px for this calculation.