Fluid Typography Calculator
Generate CSS clamp() for responsive font sizes that scale smoothly between viewport widths.
No media queries needed.
Live Preview
The quick brown fox jumps over the lazy dog
Usually 16px (browser default)
font-size: clamp(1rem, 0.5vw + 0.9rem, 1.5rem);/* Fallback for older browsers */ font-size: 16px; font-size: clamp(1rem, 0.5vw + 0.9rem, 1.5rem);
Calculation Breakdown
Formula
clamp() Values
1rem (16px)0.5vw + 0.9rem1.5rem (24px)How clamp() Works
The CSS clamp() function takes three values and returns the middle value, clamped between the minimum and maximum.
MIN
The smallest the font size can be. Used on viewports at or below your minimum viewport width.
PREFERRED
The ideal value that scales with viewport. Combines vw units with a rem offset for smooth scaling.
MAX
The largest the font size can be. Used on viewports at or above your maximum viewport width.
Why Use Fluid Typography?
- ✓No media queries needed - Font sizes scale smoothly across all viewport widths
- ✓Better reading experience - Text is always proportional to the screen size
- ✓Less CSS to maintain - One line replaces multiple breakpoint declarations
- ✓Respects user preferences - rem units scale with browser font size settings
Browser Support
The clamp() function is supported in all modern browsers (Chrome 79+, Firefox 75+, Safari 13.1+, Edge 79+). For older browsers, use the fallback output which provides a static px value first, then the clamp() value which will be ignored if not supported.
Example Usage
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