About

CarMathCalc is a small collection of free calculators for drivers: tires, fuel, charging, loans and depreciation. We built it because most car calculators online are slow, cluttered, or hide the math. Ours load instantly, work on any phone, and always show the formula.

How the calculators work

Every result is calculated in your browser using standard formulas (for example, tire diameter from the size on the sidewall, or the standard loan amortization formula). Nothing you type is sent to a server.

Accuracy

Results are estimates. Real tire dimensions vary slightly by brand, fuel use depends on how and where you drive, and loan offers depend on your lender. Confirm important numbers with your tire shop, dealer or lender.

Who is behind it

CarMathCalc is a small independent project that builds simple, useful web tools.

Questions or suggestions for a new calculator? Visit the contact page.