Power Calculator

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

Calculating Ampere (I), given kVA

Phase 1, 2, 3 Generator kVA Volts Required = Ampere I

Converting kVA to kW

kVA = kW

Converting kW to kVA

kW = kVA

Converting kW to HP

kW = HP

Line (DOL) start

What size genset is needed to start a 3 phase electric motor Direct on

HP of Motor = Generator kVA Required

Guide to units

  • HP = Horsepower
  • kW = Kilo Watts
  • kVA = Kilo Volt Amps
  • I = Ampere or Current
  • V = Volts
  • PF = Power Factor

Note:

If you require assistance with this Power Calculator or what generator will best suit your requirements, please don’t hesitate to contact us.

Generator Size to Start Motors

Instructions: Fill in the HP of the motor(s) in their starting sequence, select the start method (DOL - Direct On Line or Star Delta) and press Calculate. The required generator size will then be displayed at the bottom.

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 an estimate only because other factors such as site conditions, motor efficiencies and iron losses are not taken into consideration.