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Horsepower to Torque Calculator
Convert horsepower and RPM to torque.
Torque
—
At that RPM.
| Newton-meters | — |
|---|---|
| Horsepower | — |
| RPM | — |
| — |
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Enter your figures above to see the step-by-step working.
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How the Horsepower to Torque Calculator Works
Power and torque are linked through engine speed: torque equals horsepower times 5,252, divided by RPM. So 300 hp at 5,000 RPM is about 315 lb-ft. The constant 5,252 comes from the definition of horsepower, and it’s the RPM at which any engine’s horsepower and torque curves always cross.
Torque is the twisting force; horsepower is how quickly that force does work. This is the inverse of finding horsepower from torque and RPM.
torque (lb-ft) = horsepower × 5252 ÷ RPM
Frequently Asked Questions
How do you convert horsepower to torque?
Multiply the horsepower by 5,252 and divide by the RPM. 300 hp at 5,000 RPM is about 315 lb-ft.
Why 5252?
It comes from the definition of one horsepower; it’s also the RPM where horsepower and torque curves always intersect.
What is the difference between horsepower and torque?
Torque is the twisting force an engine makes; horsepower is the rate at which it does work.
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