Horsepower Calculator
Enter torque (lb-ft) and RPM to compute horsepower (hp) and kilowatts (kW).
Input Data
Results
152.3
113.6
At a glance:With torque in pound-feet, HP = torque × RPM ÷ 5252. 1 hp ≈ 0.7457 kW.
Formula
hp = torque × rpm ÷ 5252.
kw = hp × 0.7457.
How to Use
- Enter torque (lb-ft) and engine speed (RPM).
- Get horsepower and kilowatts instantly.
FAQ
Why divide by 5252?
It is the constant that makes torque×speed equal horsepower at 5252 RPM, derived from 1 hp = 550 ft·lb/s.
Is this wheel horsepower?
No, this is engine horsepower derived from the torque curve, without drivetrain losses.
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References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.