How is car horsepower calculated?

1 Answers
MacWalker
07/29/25 10:21pm
Car horsepower equals the product of torque multiplied by engine speed, representing how much air-fuel mixture the engine can intake per unit time. The calculation formula is: Power (W) = 2π × Torque (N·m) × RPM / 60. The simplified version is: Power (kW) = Torque (N·m) × RPM / 9549. Below are more details about horsepower: 1. Concept: Horsepower is a common unit for measuring power in engineering, with 1 horsepower approximately equal to 735 watts. 2. Influencing factors: Normally, engine displacement is directly proportional to horsepower - larger displacement means greater power output and higher horsepower.
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