Free tools that do the car math for you. Each one shows its formula in plain English, starts from placeholder numbers you replace with your own, and runs entirely in your browser, so nothing you type is stored or sent.
Car Ownership Cost
The full cost of a car over 3 to 10 years, per month and per mile.
Open calculatorRepair vs Replace
Weigh a repair bill against the car’s value and a new payment.
Open calculatorFuel Cost
What a trip or a year of driving costs in gas, and cost per mile.
Open calculatorMPG
Your real fuel economy from one fill-up, with cost per mile.
Open calculatorGas vs Hybrid vs EV
Total cost and break-even years for a gas car, a hybrid and an EV.
Open calculator
Car ownership cost calculator
See what a car really costs over 3, 5, 7 or 10 years: depreciation, insurance, fuel, maintenance, financing and taxes, per month and per mile.
Repair or replace calculator
Facing a big repair bill? Compare it with the car’s value and a new monthly payment, with the 50% rule of thumb explained.
Fuel cost calculator
Work out the gas cost of a road trip or a year of driving, plus your fuel cost per mile.
MPG calculator
Find your real fuel economy from a single fill-up, with cost per mile and liters per 100 km.
Gas vs hybrid vs EV calculator
Compare the total cost of a gas car, a hybrid and an electric car with your own prices, mileage and electricity rate, including cost per mile and break-even years.