Fluid Typography Calculator
Compute fluid clamp() type scales that flex between viewport sizes — no breakpoints needed. Set 16→20px body that just works — local math, free, no signup.
How to Use the Fluid Typography Calculator
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Frequently Asked Questions
How does clamp() scale type?
clamp(min, preferred, max) with a vw-based preferred value: 16px at 320px width growing to 20px at 1200px, fluid between, capped outside. One declaration replaces three media queries.
What vw factor?
Derived from min/max sizes over min/max viewports — the tool computes the exact slope and intercept so endpoints hit precisely.
Browser support?
clamp() works in all modern browsers (2020+). Legacy fallbacks declare a static size first, then the clamp line.
Do type settings upload?
No — math runs locally in your browser. Nothing leaves your device.
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Last updated October 2026