CSS Clamp() Calculator
Generate a fluid CSS clamp() value with a live preview and chart — for responsive typography and spacing without media queries.
Advanced: Root Font Size
Your Fluid Value
The quick brown fox jumps over the lazy dog
About this tool
The CSS Clamp() Calculator generates a fluid clamp() value that scales your font size, spacing, or any length property smoothly between a minimum and maximum viewport width — no media queries needed.
How it works
- Enter your min and max size (in px).
- Enter the min and max viewport width you want it to scale across.
- Set the CSS property name and pick your output unit (rem is recommended for accessibility).
- Click Generate — drag the live preview slider to see it scale in real time, and copy the format you need (plain value, full declaration, custom property, or Tailwind arbitrary value).