Responsive Font Calculator

Calculate responsive font-size with CSS clamp()

Settings

320px

16.0px

480px

17.5px

768px

20.1px

1024px

22.4px

1200px

24.0px

1440px

24.0px

CSS Output

clamp(16px, calc(16px + (24 - 16) * ((100vw - 320px) / (1200 - 320))), 24px)
calc(16px + (24 - 16) * ((100vw - 320px) / (1200 - 320)))

Preview text with responsive font

Responsive Font Calculator Online - Calculate CSS clamp() for typography

The Responsive Font Calculator tool helps calculate the CSS clamp() function for fluid typography. Enter font-size min/max and viewport min/max, the tool will generate CSS code that automatically scales the font according to viewport width. No need for media queries, fonts are automatically responsive. Preview results according to popular viewport sizes.

Outstanding features

Generate CSS clamp() function automatically
Enter font min/max and viewport min/max
Preview font size theo 6 viewport sizes
Copy CSS clamp() code with one click
Fallback CSS calc() for old browsers
Live preview with sample text
Calculate accurately according to the standard formula
No need to write media queries

Why do we need Responsive Fonts?

Typography needs to scale according to viewport to ensure readability on all devices. The traditional way of using media queries is very verbose and not smooth. CSS clamp() allows fonts to automatically scale smoothly from min to max size based on viewport width. The result: shorter code, better typography, better UX.

Benefits when used

  • •Font automatically scales smoothly
  • •No need for many media queries
  • •The code is concise and easy to maintain
  • •Beautiful typography on all devices
  • •Calculate accurately, no guesswork

Instructions for use

  1. 1Enter Font min (px) - smallest size on mobile
  2. 2Enter Font max (px) - the largest size on the desktop
  3. 3Enter Viewport min (px) - usually 320px (mobile)
  4. 4Enter Viewport max (px) - usually 1200px or 1440px
  5. 5See preview font size according to viewports
  6. 6Copy CSS clamp() and use

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