CSS Responsive Font Size Calculator - Fluid Typography with clamp()
Calculate responsive CSS font sizes using the clamp() function for fluid typography
CSS Tools
Calculator
How to Use
1Enter the minimum font size (in px) for small screens
2Enter the maximum font size (in px) for large screens
3Set the minimum viewport width where scaling starts
4Set the maximum viewport width where scaling stops
5Copy the generated CSS clamp() rule
Frequently Asked Questions
The CSS clamp() function lets you define a value that scales fluidly between a minimum and maximum. For font sizes, it means text grows smoothly as the viewport widens — no abrupt jumps at breakpoints.
Fluid typography with clamp() provides a smoother reading experience across all screen sizes. Instead of jumping between fixed sizes at specific breakpoints, the font scales continuously, eliminating awkward size transitions.