Auto calculators
38 free auto tools, each with the formula and step-by-step working.
- 0-60 Time CalculatorEstimate acceleration from power-to-weight.
- Boat Fuel Cost CalculatorFuel cost for a boating trip by hours run.
- Brake Pad Life CalculatorMiles left on your pads and cost per mile.
- Car Affordability CalculatorThe car price your income and budget actually support.
- Car Depreciation CalculatorProject your vehicle's value year by year.
- Car Lease Buyout CalculatorIs buying out your lease a good deal?
- Car Loan CalculatorAuto payment including trade-in, down payment and sales tax.
- Compression Ratio CalculatorStatic compression from chamber, gasket, deck and dome volumes.
- Coolant Mix CalculatorHow much antifreeze to add for the protection you need.
- Engine Displacement CalculatorBore, stroke and cylinders to cc, litres and cubic inches.
- EV Charging Cost CalculatorCost per charge, per mile, and versus petrol.
- EV Charging Time CalculatorHours to charge from any state of charge, at any power.
- EV Cost Per Mile CalculatorWhat every mile really costs in an electric car.
- EV vs Gas Cost CalculatorCompare fueling costs of an electric vs gas car.
- Final Drive Ratio CalculatorCruising RPM from axle ratio, gear and tire size.
- Fuel Cost CalculatorTrip fuel cost from distance, economy and price.
- Gas vs Electric Car Cost CalculatorSide-by-side running cost and break-even mileage.
- Hail Damage Repair Cost CalculatorPaintless dent repair cost by dent count and size.
- Horsepower From Torque CalculatorConvert torque and RPM to horsepower and kilowatts.
- Lease vs Buy CalculatorCompare the true cost of leasing against buying the same car.
- MPG CalculatorReal fuel economy from your own fill-ups.
- Oil Change Interval CalculatorWhen your next oil change is really due.
- Parking Cost CalculatorHourly, daily or monthly — which parking option wins.
- Quarter Mile ET CalculatorPredict elapsed time and trap speed from weight and power.
- Road Trip Fuel & Time CalculatorDrive time, fuel stops and total cost for any route.
- Road Trip Gas Cost CalculatorTotal fuel cost for a road trip.
- Speedometer Error CalculatorTrue speed after a tire or gearing change.
- Tire Rotation Interval CalculatorWhen your next tire rotation is due.
- Tire Size CalculatorCompare two tire sizes: diameter, circumference and speedo error.
- Tire Tread Life CalculatorMiles left before your tires hit the wear bars.
- Towing Estimate CalculatorEstimate a tow bill from hook-up fee, mileage, vehicle class and after-hours surcharges.
- Trailer Tongue Weight CalculatorCheck tongue weight, payload and hitch limits before you tow.
- Turbo Boost Horsepower CalculatorPower gain from boost pressure, with intercooler losses.
- Vehicle Depreciation Schedule CalculatorYear-by-year value and cost of ownership.
- Vehicle Payload CalculatorHow much you can legally load before you are overweight.
- Vinyl Wrap CalculatorFilm length, rolls and cost to wrap a vehicle.
- Wheel Offset CalculatorHow much a new offset moves the wheel in or out.
- Window Tint Cost CalculatorCar or home window tinting price by film type.
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