Work out motor torque from power instantly with clear inputs, formula shown and shareable results.
Power is torque times angular velocity, so torque equals power divided by 2 pi n / 60. A gearbox trades speed for torque: output torque is input torque times the ratio times gearbox efficiency, while output speed is input speed divided by the ratio.
Torque from power
T = 9550 x kW / rpm (N·m); after a gearbox T_out = T x ratio x efficiency
Electrical results are planning estimates only. Verify against the applicable wiring rules (IEC 60364, BS 7671, NEC or local code) and have all installation work designed and checked by a qualified electrician.
It is 60,000 / (2 pi), the constant that converts kilowatts and rev/min directly into newton metres.
No. Power is conserved less losses; the gearbox simply exchanges speed for torque at constant power.