The leading free tire size calculator and comparison tool. Professional-grade calculations trusted by mechanics, enthusiasts, and everyday drivers worldwide.
We provide accurate, professional-grade tire calculations to help drivers make informed decisions about tire sizes, ensuring safety, performance, and legal compliance. Our tools bridge the gap between complex tire engineering and practical everyday needs.
At tiresizecalculator.co, we believe that everyone should have access to professional tire calculation tools without the need for expensive software or specialized knowledge. Whether you're a professional mechanic, automotive enthusiast, or everyday driver considering new tires, our calculators provide the precise information you need.
Compare tire sizes with professional accuracy
Calculate exact speedometer errors and corrections
Performance upgrade calculations
Comprehensive tire size reference
Performance and fuel economy analysis
Works perfectly on all devices
Our calculations use the same formulas and standards employed by tire manufacturers and professional automotive shops:
Used by tire shops, mechanics, and automotive professionals worldwide. Our calculations match those used in professional tire fitting software, but available free to everyone.
We don't store your tire calculations or personal information. All calculations happen in your browser, and we only collect basic analytics to improve our service. Read our Privacy Policy
Our core tire calculation tools will always be free. No hidden fees, no premium upgrades, no registration required.
We regularly update our tire database and add new features based on user feedback and industry changes.
Optimized for speed and reliability. Our tools work instantly without delays or complicated interfaces.
We prioritize safety with clear warnings about tire size limits and recommendations for professional consultation.
Have questions, suggestions, or found an issue? We'd love to hear from you!
support@tiresizecalculator.co
Technical issues & improvements
business@tiresizecalculator.co
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