Terms of use

Last updated 2026-10-08.

The calculators on this site are provided free, as is, for estimating and reference. They use nominal part sizes and standard formulas, and real parts vary by maker, wear and vehicle.

You are responsible for checking every result against the manufacturer’s specifications for your vehicle and parts, and for having fitment and modifications done by qualified people. Wrong tire, wheel or gearing choices can affect braking, handling, load capacity and safety systems.

To the extent the law allows, WrenchCalc is not liable for any loss arising from use of these calculators or reliance on their results.