Car calculators
Calculators for drivers and car owners. For trips use the Fuel trip cost calculator, Trip time calculator, Fuel tank range calculator, Carpool cost splitter and Mileage reimbursement. For electric cars there are EV charging time calculator, EV cost per mile and EV range. Wheels and speed are covered by Tire size calculator, Wheel offset, Speedometer error calculator, RPM to speed calculator and Stopping distance calculator. Engine tools include Compression ratio, Engine displacement, Horsepower and torque calculator, Quarter mile and Two-stroke fuel mix calculator. Towing capacity calculator, Oil change interval calculator and Car maintenance log help with upkeep, while Lease vs buy car, Car depreciation and Car ownership cost calculator work out the money side.
- Fuel trip cost calculatorFuel needed and cost of a drive from distance, consumption and fuel price, split between the people in the car.
- Oil change interval calculatorNext oil change by odometer or by months, whichever comes first, with an estimated date.
- Tire size calculatorSidewall, overall diameter, circumference and revs per km or mile of a tyre size, plus the speedometer effect of a new size.
- Carpool cost splitterFuel, tolls and parking for a shared trip, split per person, with an optional free ride for the driver.
- Speedometer error calculatorThe error of a speedometer in percent, from a change of tyre size or from a GPS speed, with the true speed it implies.
- Fuel tank range calculatorDistance you can drive on the fuel in the tank, to empty and down to a reserve you choose.
- RPM to speed calculatorRoad speed at a given engine RPM, or the RPM needed for a speed, from gear ratio, final drive and tyre size.
- Wheel offsetBackspacing and how much a wheel moves in or out when width or offset (ET) changes.
- EV charging time calculatorCharging time, energy added and cost for an electric car, from battery size, start and end percentage and charger power.
- Trip time calculatorDriving time from distance and average speed, plus stops, with the arrival time for your departure.
- EV rangeElectric car range from battery kWh, usable percentage and consumption, with a rough temperature adjustment.
- EV cost per mileRunning cost per km or mile of an electric car against a petrol car, and the yearly saving.
- Compression ratioStatic compression ratio from bore, stroke, chamber, gasket, deck height and piston volume.
- Lease vs buy carCompares leasing with buying on a loan over the same number of months, counting the resale value of the car you buy.
- Stopping distance calculatorReaction distance plus braking distance for a speed and road surface, from a simple physics model.
- Engine displacementDisplacement in cc, litres and cubic inches from bore, stroke and the number of cylinders.
- Horsepower and torque calculatorPower from torque and RPM, or torque from power and RPM, in hp, kW, PS, N·m and lb·ft.
- Quarter mileEstimated quarter-mile time and trap speed from weight and horsepower, using empirical formulas.
- Two-stroke fuel mix calculatorOil to add for a fuel amount at a ratio from 25:1 to 100:1, in mL and US fl oz.
- Car depreciationEstimated car value year by year from the price and a yearly depreciation percentage.
- Car ownership cost calculatorThe yearly, monthly and per-distance cost of owning a car, from depreciation, fuel, insurance, servicing and other costs.
- Towing capacity calculatorCompare trailer weight with the towing rating you enter, estimate tongue weight and check combined weight.
- Mileage reimbursementTotal distance and reimbursement from a list of trips and a rate per mile or kilometre.
- Car maintenance logLog services with date, odometer and cost, get reminders by odometer and export to CSV.