AutoCalc catalog
Car calculators
Practical automotive tools with instant results, clear formulas and no signup. Live calculators are ready to use; planned pages remain unpublished until their calculations are complete.
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Live calculators
Maintenance
Wheel offset
Compare wheel width and offset, suspension clearance, outer poke, backspacing and fitment.
Open calculatorMaintenance
Gear ratio
Calculate vehicle speed and engine RPM from tire diameter, transmission gear and final drive ratio.
Open calculatorMaintenance
Tire size
Compare tire and wheel sizes, clearance, diameter and speedometer error.
Open calculatorFuel
Fuel cost and MPG
Calculate fuel cost, gas mileage, MPG, trip fuel use and cost per mile.
Open calculatorMaintenance
Power-to-weight ratio
Calculate horsepower or kilowatts per pound, kilogram and metric ton.
Open calculatorOwnership
Vehicle depreciation
Estimate future value, depreciation by year and vehicle value loss per mile.
Open calculatorBuying a car
Car affordability
Work backward from a monthly payment to an affordable vehicle price with APR, tax, fees and cash credits.
Open calculatorElectric vehicles
EV charging cost
Calculate charging cost, wall energy, charging losses, time, range added and electricity cost per mile.
Open calculatorTrips
Commute cost
Calculate daily, monthly and annual driving costs with gas, parking, tolls and vehicle wear.
Open calculatorBuying a car
Car loan
Estimate monthly payments, total interest and the repayment schedule.
Open calculatorBuying a car
Car refinance
Compare a current and new auto loan, monthly savings, total interest and break-even time.
Open calculatorBuying a car
Auto loan payoff
Estimate payoff time and interest savings from extra auto loan payments.
Open calculatorBuying a car
Car leasing
Estimate the deposit, monthly payments, residual value and total contract cost.
Open calculatorBuying a car
Out-the-door price
Add vehicle price, sales tax, dealer fees, registration, trade-in and down payment.
Open calculatorTrips
Mileage reimbursement
Calculate reimbursement from business miles, a custom per-mile rate, parking, tolls and other expenses.
Open calculatorTrips
Driving time
Estimate driving time from distance and average speed, then add planned stops and traffic delay.
Open calculatorOwnership
Cost of car ownership
Estimate depreciation, financing and operating expenses per year, month and mile.
Open calculatorBuying a car
Negative equity
Calculate a trade-in shortfall, rolled balance, new amount financed and loan-to-value ratio.
Open calculatorElectric vehicles
Gas vs. electric cost
Compare purchase price, energy and maintenance costs and estimate EV break-even time.
Open calculatorBuying a car
Lease vs. buy
Compare leasing and financing over the same period using vehicle equity, loan balance and mileage.
Open calculator