A familiar situation
Ordnen Sie Drehmoment- und Drehzahlangaben aus einem Datenblatt in eine Leistungsgröße ein.
How to use this calculator
- Enter torque, engine speed.
- Select Calculate to see the answer and its breakdown.
- Keep a scenario, change an input and compare the results.
Use consistent units and check the assumptions below before applying the result.
How horsepower is calculated
Estimate mechanical horsepower from torque and rotational speed using HP = torque × RPM / 5252 when torque is in lb-ft. The result is shaft power under that conventional unit system; drivetrain losses and measurement accuracy are not included. 300 lb-ft at 4,000 rpm corresponds to about 228 horsepower. The calculation validates each input and keeps its stated units explicit. No. Power also depends on rotational speed. This is an estimate for the stated assumptions; confirm measurements and any applicable professional or local standards before relying on it.
hp = torque(lb-ft) × rpm ÷ 5252300 lb-ft at 4,000 rpm corresponds to about 228 horsepower.
Assumptions & useful context
The result depends on the values you enter and the method described above. Displayed numbers may be rounded; calculations use the unrounded values. Check that this model matches your situation before relying on it.
Frequently asked questions
Can horsepower be estimated from torque alone?
No. Power also depends on rotational speed.
Is this wheel horsepower?
Only if the torque input was measured at the wheels; the equation itself does not estimate drivetrain loss.