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
px
Raw pixel value
Relative to the base font size
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.
Live text preview
Hello
CSS snippet
className="text-[16px]"
Base presets comparison
Rem value to compare
BasePixels% of base
14px14100%
16px16100%
18px18100%
20px20100%
24px24100%