Build a clamp expression for responsive font sizing.
Use the example inputs or enter your own values.
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Fits a linear slope between two viewport/font-size pairs, bounded by CSS clamp.
Enter minimum font size (px), maximum font size (px), minimum viewport (px), maximum viewport (px). Update the result, inspect it, then copy or download the output. Reset restores the example inputs so you can start a new calculation.
Example inputs: Minimum font size (px): 18 · Maximum font size (px): 40 · Minimum viewport (px): 375 · Maximum viewport (px): 1440.
Output uses rem at a 16 px reference and viewport width. Test browser zoom and your actual root font size.
The tool does not connect to your website, change your hosting or install anything in WordPress. Any output must be applied separately in the intended environment.
No. This tool works in a modern browser with JavaScript enabled. Your inputs are not submitted to a server by the tool.
Use Copy for the textual result or Download for a local file. Image tools download a generated image when one is available.
No. It produces a result for you to review. Production changes remain a separate step.
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