Unit Converter

Convert px, rem, em, and percent values with an adjustable base font size for responsive typography and spacing.

Unit Converter

Base font size

Pixels

Raw pixel value

Percent

Relative to the base font size

rem

Root-relative size (usually the HTML font size)

Element-relative size using the same base

Preview text

Font size uses the current pixel value from the converter.

Hello

className="text-[16px]"

Base presets comparison

Rem value to compare

BasePixels% of base

14px14100%

16px16100%

18px18100%

20px20100%

24px24100%