Responsive Font Calculator
Calculate CSS clamp() values for responsive typography. Set min/max font sizes and viewport breakpoints to generate fluid type scales.
Preview
The quick brown fox jumps over the lazy dog
font-size: clamp(16px, 0.8182rem + 0.9091vw, 24px);
How CSS clamp() Works
The clamp() function takes three values: a minimum, a preferred (fluid) value, and a maximum. The browser picks the middle value, clamped between min and max.
Deploy your project — hosting from $2.99/mo
- ✓ WordPress hosting
- ✓ VPS servers
- ✓ Free domain
- ✓ 99.9% uptime
Cloud infrastructure for developers
- ✓ Droplets from $4/mo
- ✓ Managed databases
- ✓ App Platform
- ✓ Kubernetes
Some links on this page are affiliate links. If you click and make a purchase, we may earn a commission at no extra cost to you.
Disclaimer:This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.