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Horsepower Calculator

Calculate mechanical shaft power from measured torque and rotational speed.

How It Works

Power(W)=torque(N·m)×rpm×2π/60. Mechanical horsepower=745.6998715822702 W; metric horsepower=735.49875 W. This does not estimate engine output from displacement or vehicle acceleration.

Reference Sources

FAQs

How does this calculator work?

Power(W)=torque(N·m)×rpm×2π/60. Mechanical horsepower=745.6998715822702 W; metric horsepower=735.49875 W. This does not estimate engine output from displacement or vehicle acceleration.

What assumptions should I check?

Check the units and definitions shown beside each input. Results use the values you enter.