Free Shaft Power Calculator
Calculate the mechanical power transmitted by a rotating shaft from torque and rotational speed.
N-m
RPM
Shaft Power
15.71 kW
Shaft Power15,708 W
Shaft Power21.06 hp
Shaft Power vs Shaft Torque (T)
Shaft Power from Torque and Speed
Rotational power is the product of torque and angular velocity.
Formula
P = T omega = T (2 pi N / 60)
where T is torque in N-m, N is speed in RPM, and P is power in watts. Dividing by 1000 gives kilowatts. One horsepower equals 746 watts.
Example Calculation
A shaft transmitting 100 N-m torque at 1500 RPM.
- 01omega = 2 x pi x 1500 / 60 = 157.08 rad/s
- 02P = 100 x 157.08 = 15,708 W = 15.71 kW
- 03P = 15,708 / 746 = 21.06 hp
Frequently Asked Questions
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