Handy Hire - Generator Calculator
Handyhrie Power Generators
Genset Calculator

The Formula Results Listed Are Estimates Only

These Calculators will assit you in determining what size generatorS you may require for your project.

They Calculate:
  • Amperes when kVA is known
  • Convert kVA to kW
  • Convert kW to kVA
  • Convert kW to HP
  • kVA Required to run motor
  • Guide to units:
    HP = Horsepower
    kW = Kilo Watts
    kVA = Kilo Volt Amps
    I = Ampere or Current
    V = Volts
    PF = Power Factor

    Calculate Amperes (I), given kVA.
    1, 2, 3
    = Ampere

    Converte kVA to kW
    kVA = kW
    Converte kW to kVA
    kW = kVA

    Converte kW to HP
    kW = HP

    What size genset is needed to start a 3 phase electric motor (DOL) start
    HP of
    = Kva
    Generator Required

    Generator Size to Start Motors

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

    3 Phase (415 volt @ 50Hz)
    1 Phase (240 volt @ 50Hz)

    Starting Sequence Motor HP Start Method
    DOL / StarDelta
    Run Variable Phase Current Starting Value Total Run Current Total Start Current
    1 /
    2 /
    3 /
    4 /
    5 /
    6 /
    Generator Size for Starting with: kVA*
    Generator Size for Running with: kVA*
    Generator Size Recommended: kVA*


    * Please NOTE the above Calculations are estimates only because other factors such as motor size & cable size,.