Free Shaft Torque Calculator
Determine the torque on a rotating shaft from the transmitted power and rotational speed.
kW
RPM
Shaft Torque
95.49 N-m
Shaft Torque vs Shaft Power (P)
Shaft Torque from Power and Speed
When power and speed are known, torque can be back-calculated.
Formula
T = P / omega = P x 60 / (2 pi N)
where P is power in watts, N is speed in RPM, and T is torque in N-m. This is essential for sizing shafts, couplings, and gearboxes.
Example Calculation
A 15 kW motor running at 1500 RPM.
- 01P = 15,000 W
- 02T = 15,000 x 60 / (2 x pi x 1500)
- 03T = 900,000 / 9424.8 = 95.49 N-m
Frequently Asked Questions
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