3 calculators in this category
- Horsepower from Torque CalculatorMechanical power definition, 1 hp = 33,000 ft·lbf/minPower is torque multiplied by rotational speed, and the constant 5,252 is the only thing standing between the two. Enter torque…
- Power to Weight Ratio CalculatorRace-weight convention (weight as raced, driver included)Power to weight ratio is the single number that predicts how hard a vehicle accelerates, and it is the number racing classes…
- Drivetrain Loss & Crank Horsepower CalculatorPercentage drivetrain loss conventionA chassis dyno measures power at the tyres. A manufacturer quotes power at the flywheel. Between them sits the gearbox…
Which one do you need?
- Horsepower from Torque Calculator
- Convert torque and engine speed into horsepower, kilowatts and PS with the 5,252 constant, or solve back for the torque behind a power figure.
- Power to Weight Ratio Calculator
- Work out pounds per horsepower, horsepower per ton and kilowatts per tonne, then find the power or weight you need to hit a target ratio for your class.
- Drivetrain Loss & Crank Horsepower Calculator
- Convert chassis dyno wheel horsepower to crank horsepower, or back, using drivetrain loss figures for manual, automatic and all-wheel-drive layouts.
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