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CSS Unit Converter
A free online CSS unit converter that converts between px, rem, em, vh, vw, pt, and cm. Enter your base font size for accurate rem and em calculations. Essential for responsive design work, converting Figma designs to CSS, or porting fixed-pixel layouts to fluid, accessible designs.
Calculation Basis
Conversion Table — 16 px
| Unit | Description | Value |
|---|---|---|
| px | Pixels | 16(source) |
| rem | Root Em | 1 |
| em | Em (relative to root) | 1 |
| pt | Points | 12 |
| vw | Viewport Width % | 0.8333333 |
| vh | Viewport Height % | 1.481481 |
| cm | Centimeters | 0.4233331 |
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