Modern CSS clamp()
Fluid Typography & clamp() Calculator
Generate accessible, responsive font scales that scale smoothly with viewport width. Includes interactive screen width simulator and Tailwind classes.
CSS Fluid Typography & clamp() CalculatorModern Responsive Scales
Calculate smooth viewport-based typography without abrupt CSS media queries. Outputs accessible rem-based clamp() rules.
Screen Viewport Boundaries (px)
Font Size Range (px)
Typography Scale Presets:
Live Viewport Width Simulator800px
Responsive Heading
Active font-size: 26px (1.625rem)
Pure CSS Declaration
font-size: clamp(1.1250rem, 0.6849rem + 1.8779vw, 2.3750rem);
Tailwind CSS Arbitrary Class
text-[clamp(1.1250rem,0.6849rem+1.8779vw,2.3750rem)]
Accessible rem Linear Interpolation
Live Viewport Width Simulator
Tailwind Arbitrary Class Output
Pre-Tested Typography Scales
How to Use CSS Fluid Typography & clamp() Calculator (Step-by-Step Guide)
No software installation required. Complete your task in 3 easy steps directly in your browser.
1
Define Viewport Range
Enter minimum (e.g. 375px mobile) and maximum (e.g. 1440px desktop) screen widths.
2
Set Font Size Range
Choose minimum and maximum font sizes in pixels or rem units.
3
Copy CSS or Tailwind
Copy generated clamp(...) code or test scaling with the live viewport slider.
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Frequently Asked Questions
clamp() smoothly interpolates font sizes on every single pixel between mobile and desktop, eliminating sudden jumps or stepped typography.