// multi-utility computation suite · offline · instant · precise
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sci.torque-power-rotational Calculator
Calculates rotational power from torque and angular velocity: P = τω = τ × 2πn/60. A car engine producing 400 N·m torque at 4,000 RPM delivers 167 kW (224 hp) — power increases linearly with RPM.
Inputs
Torque Nm
Rotational force (N·m) = force × perpendicular lever arm. Engine torque peaks at lower RPM; horsepower peaks higher.
Rotation Speed Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Results
power (kW)
Reference formula or conversion factor shown for context.
power (HP)
Reference formula or conversion factor shown for context.
angular velocity (rad/s)
Sample size or count used in the calculation.
P = T × ω = T × 2πN/60
Sample size or count used in the calculation.
1450 RPM motor at 100 N·m
The value at the specified point or condition.
efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.