About Tire Size Calculator

Welcome to Tire Size Calculator, the internet's most comprehensive and data-driven resource for automobile tire analysis, safety verification, and performance comparison.

Founded in 2026, our platform was built with a singular mission: To bridge the gap between complex automotive engineering and the everyday car owner. We understand that changing tires is not just a cosmetic upgrade; it is a critical modification that impacts the safety, fuel economy, and handling of your vehicle.

Our Technology & Algorithm

Unlike standard calculators that merely display dimension differences, Tire Size Calculator employs a proprietary Safety-First Algorithm. When you input your stock and new tire sizes, our system performs three critical checks in real-time:

• 1. Diameter Variance Analysis: We calculate the precise percentage difference in overall diameter. Automotive standards suggest that any variance exceeding 3% can lead to brake failure (ABS issues) and transmission stress. Our tool automatically flags these dangerous upgrades.
• 2. Speedometer Calibration Logic: We use physics-based formulas to determine exactly how your speedometer reading will shift. For example, knowing that at 100 km/h, you are actually traveling at 105 km/h can save you from unintentional speeding tickets.
• 3. Clearance & Scrub Radius Estimation: We analyze the section width to predict if the new tire might rub against your vehicle's fender or suspension components during tight turns.

Why Trust Us?

Our data is sourced from international tire sizing standards (ETRTO and TRA). We are a team of automotive enthusiasts and data engineers dedicated to accuracy. Every calculation on this website is verified against physical physics formulas used by tire manufacturers globally.

Our Promise to Users

We promise to keep this tool 100% Free and accessible to everyone. Whether you are a car tuner looking for the perfect stance, or a daily commuter looking to save money on fuel with narrower tires, Tire Size Calculator is here to guide you safely.

Drive Safe,
The TireCalc Team