Fluid Typography Clamp Calculator
Generate a CSS clamp() function for fluid text that scales smoothly between two viewport sizes. Everything runs offline in your browser.
This tool is fully client-side. No data leaves your device, ensuring your design specifications remain private.
This css clamp calculator generates the precise mathematical values needed for the clamp() function in CSS. It allows you to define a minimum font size for small screens and a maximum size for large screens, calculating the linear scaling factor in between.
You would use this tool when you want typography or padding to scale smoothly based on the viewport width, eliminating the need for multiple stepped media queries. It is designed for font sizes, margins, and padding, but it does not generate the full CSS class—only the value for the property.
The tool runs entirely in your browser. No data is uploaded to a server, and the calculations happen locally on your machine, meaning it works offline once the page has loaded.
How to Use Fluid Typography Clamp Calculator
- Set your viewport range — Enter the minimum and maximum screen widths where the scaling should start and stop.
- Define font sizes — Input the minimum font size for mobile and the maximum size for desktop.
- Copy the output — Copy the generated clamp() function directly into your CSS stylesheet.
Frequently Asked Questions
What is the CSS clamp() function?
The clamp() function takes three parameters: a minimum value, a preferred value (usually a viewport unit), and a maximum value. It ensures a property stays within a defined range while scaling dynamically between those two limits.
Why use clamp instead of media queries?
Media queries create 'steps' where the text jumps in size at specific breakpoints. Clamp creates a linear transition, meaning the text grows or shrinks by a fraction of a pixel for every pixel the window is resized.
Does this tool support REM units?
Yes, the calculator handles REM and PX units to ensure your fluid typography remains accessible and respects the user's browser font size settings.
Can I use this for spacing and margins?
Yes. While often used for typography, the mathematical logic for fluid scaling applies to any CSS length property, including padding, margins, and gap values.