115 free calculators · no sign-up
Pure-math car calculators.
MotorMath has the maths for total cost of ownership, EV vs ICE comparison, 0-60 estimation, fuel economy conversion, and dozens more car questions. Every result is calculated from your figures — jurisdiction-neutral, no accounts, no sign-up.
Browse by category
View all →Depreciation, fuel, insurance and servicing added up across your ownership period.
View calculators →Compare electric and petrol or diesel cars on cost, range, charging and emissions.
View calculators →0-60 times, power-to-weight, aerodynamic drag, gearing and other engineering maths.
View calculators →MPG, L/100km, cost per mile and every common fuel-economy conversion.
View calculators →Loan payments, affordability rules, deposits, APR and lease maths.
View calculators →Everyday car maths: trip costs, tyre sizes, towing limits and journey planning.
View calculators →Depreciation curves, residual values and resale projections.
View calculators →Why MotorMath
Transparent formulas
Every tool shows the exact equation, the variables behind it and its sources. Nothing is hidden in a black box.
No accounts, no tracking
Calculations run in your browser. The figures you enter never leave your device, there are no tracking cookies, and you never need to sign up or log in.
Jurisdiction-neutral
No baked-in taxes, currencies or country assumptions. You supply the numbers, so the answer fits wherever you are.
Car calculators that show their working
MotorMath is a free library of 115 car calculators covering the questions that actually change a buying, running or selling decision: what a car really costs over its lifetime, whether an EV beats a petrol equivalent, how quickly it will depreciate, what a loan will cost in interest, and how far a tank or a battery will take you. Each tool is built around a single, documented formula and shows the equation, the variables and the sources behind the answer.
Unlike calculators that bake in one country's tax rules or fuel prices, every MotorMath tool is jurisdiction-neutral. You enter your own prices, mileage and rates, and the calculator does the pure maths — so the result is valid whether you drive in London, Los Angeles or anywhere else. There are no accounts, no data collection and no limits: every figure is computed in your browser the moment you type it.
Frequently asked questions
Are the MotorMath calculators free to use?+
Yes. Every calculator on MotorMath is completely free, with no account, sign-up or payment required. There are no usage limits and no data is stored against you.
What does "jurisdiction-neutral" mean?+
MotorMath calculators do not assume a country, currency or tax regime. They compute pure maths from the figures you enter — your prices, your mileage, your rates — so the results are valid wherever you are.
How accurate are the results?+
Each tool applies a documented, standard formula and shows the calculation method and sources. Results are only as accurate as the inputs you provide; they are intended for estimation and education, not as financial or professional advice.
Do the calculators store or share my data?+
No. Calculations run entirely in your browser. The figures you enter — income, deposit, mileage, loan terms — are never sent to a server, stored or shared, and no sign-up is required to use any tool. We do count anonymously which calculators are used, via a single cookie-less request that carries no identifier and none of your figures.