Shaft Torque Calculator — Formula
## 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.
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.
Exemplo Resolvido
A 15 kW motor running at 1500 RPM.
- P = 15,000 W
- T = 15,000 x 60 / (2 x pi x 1500)
- T = 900,000 / 9424.8 = 95.49 N-m