CSS Unit Converter
Free online CSS Unit Converter. Convert pixels to rem, em, vw, vh, and more instantly. Adjustable base font size for accurate web development and responsive design.
100% Private (In-Browser)Instant Web Worker SpeedZero Server Upload
CSS Unit Converter by Privacy-First Toolbox is a 100% free, client-side browser utility. It processes your files locally on your computer or smartphone using HTML5 and Web Workers—zero bytes of your files or data are ever uploaded to any external server.
Configuration
Commonly 16px
Rapid Unit Converter
PX
REMBased on 16px base size
1.000rem
EMBased on 16px parent size
1.000em
Point (PT)Standard print unit (1pt = 1/72 inch)
12.00pt
Percent (%)Relative to 16px base
100.0%
Viewport Width (VW)Based on 1920px viewport
0.833vw
Viewport Height (VH)Based on 1080px viewport
1.481vh
Key Features
- PX to REM/EM conversion
- Viewport unit support
- Custom base font size
- Real-time calculation
Common Use Cases
- Responsive layout design
- Standardizing font sizes
- Mobile-first development
Frequently Asked Questions
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