Power Calculator

The following calculators are provided to help you determine the size of generator required for your specific application. Other calculators on this page are for unit conversions and other Generator Power related calculations.

Please feel free to use our generator power calculator for help with choosing the right generator for you.

 

Key:-
HP = Horsepower KW = Kilo Watts kVA = Kilo Volt Amps I = Ampere or Current V = Volts PF = Power Factor
 
Calculate Required Ampere (I), given kVA
Phase: kVA: Volts: Ampere I:
Convert kVA to kW
kVA: KW =
Convert kW to kVA
KW: kVA =
 
Convert kW to HP
KW: HP =
Genset Required to start 3 phase motor (DOL) Start
HP: kVA =
 

Generator Size to Start Motors

Instructions:
Insert the Motor HP in their starting sequence, select the start method, select the phase then press Calculate to calculate the required generator size.

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 /
Select Phase: 3 Phase (415 volt @ 50Hz) 1 Phase (240 volt @ 50Hz)
Starting Size: kVA* Running Size: kVA* Recommended Size: kVA*
* Calculations are an estimate only.

Power Consumption Calculator

Appliance Rated Watts (Appliances) Rated kVA (to operate appliance) Rated kVA ( to start appliance)
Air Conditioner (Evaporative model) 275-1000 0.34-1.25 1.36-5
Air Conditioner (Reverse cycle) 200-2500 0.25-3.13 1-12.5
Clothes Dryer 2400 3 3
Coffee Percolator 550 0.69 0.69
Can Opener 100 0.13 0.52
Deep Freezer 500 0.63 2.52
Disposal Unit 650 0.81 3.24
Dishwasher 1000-3000 1.25-3.75 1.25-3.75
Domestic Water Pumps 275-1000 0.34-1.25 1.36-5
Exhaust Fan 40 0.05 0.2
Food Processor 500 0.63 2.52
Floor Polisher 350 0.44 1.76
Frypan 1400 1.75 1.75
Hair Dryer 1500 1.88 1.88
Hotwater Service 2500-3000 3.13-3.75 3-13-3.75
Iron 800-1500 1-1.88 1-1.88
Kettle or jug 1600-3000 2-3.75 2-3.75
Lights 25-200 0.03-0.25 0.03-0.25
Microwave 1500 1.88 1.88
Oven 4000-8000 5-10 5-10
Radio 60 0.08 0.08
Radiator 1000-2500 1.25-3.13 115-3.13
Refrigerator (home) 300 0.38 1.52
Sewing Machine 60 0.08 0.32
Space Heater 2000 2-5 2.5
Television 75-200 0.09-0.25 0.09-0.25
Toaster 250-1250 0.3-1.56 0.3-1.56
Washing Machine 500-3000 0.63-3.75 2.52-15
Welder 140A 5000 6.25 8 min


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