Automotive
MPG, horsepower, gear ratios and car-cost calculators for drivers.
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Horsepower to Torque Calculator
Convert horsepower to torque at a given RPM.
Torque to Horsepower Calculator
Convert torque to horsepower at a given RPM.
Tire Pressure Temperature Calculator
Estimate tire pressure change with temperature.
Engine Displacement Calculator
Calculate engine displacement from bore and stroke.
Compression Ratio Calculator
Calculate an engine’s compression ratio.
EV Range Calculator
Estimate the driving range of an electric vehicle.
Fuel Injector Size Calculator
Calculate the injector size for a target horsepower.
Air-Fuel Ratio Calculator
Calculate the air-fuel ratio and lambda.
Speedometer Error Calculator
See how tire size changes affect your speedometer.
Wheel Offset Calculator
Calculate wheel offset from width and backspacing.
Lease vs Buy Car Calculator
Compare leasing to buying a car.
Car Depreciation Calculator
Estimate a car’s future value after depreciation.
MPG Calculator
Calculate your fuel economy in miles per gallon.
Gas Cost Per Mile Calculator
Find how much fuel costs you per mile.
Horsepower Calculator
Calculate horsepower from torque and RPM.
Torque Calculator
Calculate torque from horsepower and RPM.
Engine Displacement Calculator
Calculate engine displacement from bore and stroke.
Gear Ratio Calculator
Calculate the gear ratio between two gears.
Tire Size Calculator
Calculate overall diameter and circumference from a tire size.
Wheel RPM Calculator
Calculate wheel RPM from speed and tire diameter.
Miles Per Tank Calculator
Estimate your driving range on a full tank.
Fuel Savings Calculator
Compare two vehicles’ annual fuel costs.
Lease Mileage Overage Calculator
Estimate charges for exceeding your lease mileage.
Power-to-Weight Ratio Calculator
Calculate a vehicle’s power-to-weight ratio.