CSS Clamp Calculator

Build responsive font-size, spacing, or layout values with visible slope and intercept math.

Min size (px)

Max size (px)

Min viewport

Max viewport

Root px

Output

Slope—

VW coefficient—

Intercept—

Range—

Runs locally in your browser. Generated CSS is not deployed or tested against your site automatically.

How to use this CSS Clamp Calculator

Generate mathematically correct fluid CSS clamp() values from size and viewport ranges. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.