CSS Unit Converter — Free Online CSS Unit Converter | KpAI

Convert CSS Units

Value

From

Result

1

To

16px = 1rem

Conversion formula

Divide px by 16 (base font size) to get rem

SettingsConversion Context

Base Font Size (px)

Used for rem, em, % conversions

Viewport Width (px)

Used for vw conversions

Viewport Height (px)

Used for vh conversions

Quick Reference

From	To	Note
`1rem`	`16px`	At 16px base
`1em`	`16px`	At 16px parent
`100%`	`16px`	At 16px base
`1in`	`96px`	Fixed ratio
`1cm`	`37.7953px`	Fixed ratio
`1mm`	`3.7795px`	Fixed ratio
`1pt`	`1.3333px`	Fixed ratio
`1vw`	`19.2px`	At 1920px viewport
`1vh`	`10.8px`	At 1080px viewport
`62.5%`	`10px`	10px base trick

About CSS Unit Converter

Convert between CSS units instantly. Relative units like rem and em depend on the base font size (typically 16px in browsers). Viewport units (vw, vh) are relative to the browser window dimensions. Absolute units like px, pt, cm, mm, and in have fixed ratios to each other (1in = 96px = 72pt = 2.54cm). Adjust the settings above to match your project's configuration for accurate conversions.