CSS Units Converter & Calculator | Web Development Toolkit
CSS Units Converter & Calculator
Convert between different CSS measurement units for responsive and pixel-perfect web design.
Base Settings
Unit Converter
px
16
em
1
rem
1
%
100
vw
1.11
vh
1.78
pt
12
Common CSS Units Reference
Typography
- Body text: 16px / 1rem
- H1: 32px / 2rem
- H2: 24px / 1.5rem
- H3: 20px / 1.25rem
- Small text: 14px / 0.875rem
Spacing
- Small: 8px / 0.5rem
- Medium: 16px / 1rem
- Large: 24px / 1.5rem
- XL: 32px / 2rem
- XXL: 48px / 3rem
Breakpoints
- Mobile: 375px
- Tablet: 768px
- Laptop: 1024px
- Desktop: 1440px
- Large Desktop: 1920px
Container Widths
- Small: 540px
- Medium: 720px
- Large: 960px
- XL: 1140px
- XXL: 1320px
About CSS Units
Absolute Units
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Relative Units
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Best Practices
Use rem for typography to ensure proper scaling with user preferences |
Use em for component-level spacing that should scale with its text |
Use % for flexible layouts and responsive widths |
Use vw/vh for elements that should always be proportional to viewport |
Use px sparingly, mainly for borders and small decorative elements |
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