We provide these calculators to assist you in determining the size of generator you require.  They also allow you to convert one unit of electricity measurement to another.

Calculate: Amperes when kVA is known Converting kVA to kW Converting kW to kVA Converting kW to HP kVA Required to run motors

Guide to units: HP = Horsepower kW = Kilowatts kVA = Kilovolt Amps I = Ampere or Current E = Volts P.F. = Power Factor

Sizing Data - Power Consumption

3 Phase Calculations

Generator Size Required to Start Motors

Instructions: You only need to fill in the columns coloured in blue.
Fill in the HP of the motor(s) in their starting sequence, select the start method (Direct On Line or Star Delta) and press Evaluate. The required generator size will then be displayed at the bottom.

*  NOTE the above calculations are an estimate only because other factors such as site conditions, motor efficiencies and line losses are not taken into consideration.