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

px - Pixels: Fixed size, not responsive
pt - Points: 1pt = 1/72 of an inch
cm - Centimeters
mm - Millimeters
in - Inches

Relative Units

em - Relative to parent element's font size
rem - Relative to root element's font size
% - Percentage of parent element
vw - 1% of viewport width
vh - 1% of viewport height

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

Web Utility Labs - CSS Units Converter & Calculator

Privacy Friendly: All calculations happen in your browser. No data is sent to any server.

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