Electrical / Electronics
Motor input power
Calculates input power from output power and efficiency.
Related calculators
Motor efficiency
Calculates motor efficiency as output power divided by input power.
Motor power from torque and speed
Calculates approximate power from torque and rotational speed.
Single-phase active power
Calculates single-phase active power from RMS voltage, RMS current and power factor.
Simple three-phase motor current
Calculates approximate three-phase motor current from power, voltage, power factor, and efficiency.
DC motor back EMF
Calculates back EMF from supply voltage, armature current and armature resistance; with a back-EMF constant it also gives angular speed.
DC motor starting current and torque
Calculates current and torque at zero back EMF in a simple armature model.