Horsepower Equations Calculator

Automobile Car Truck Design Formulas

Solving for vehicle power to weight ratio.
vehicle power to weight ratio
This method uses power in horsepower and weight in pounds to determine the power to weight ratio. A car with a high power to weight ratio will accelerate faster than a automobile with a lower value.


vehicle power
vehicle weight


power = 0    = 0  horsepower
weight = 0    = 0  pound


power to weight ratio (horsepower:pounds)

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rotating horsepower
Rotating horsepowerRotating horsepower
SpeedSpeed - revolutions per minute (rpm)
estimate engine or motor horse power for cars, trucks and motorcycles
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ET methodCalculate engine horsepower after a quarter mile run using the ET method.
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Dyno correction factorDyno correction factor. Factor corrects horsepower for normally aspirated internal combustion engine to a standard humidity, pressure and temperature after dynamometer measurement.
vehicles power to weight ratioCalculate a vehicles power to weight ratio. Acceleration is related to the ratio.

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