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Tools & Info

Electrical Power Calculators

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 power related calculations.
Calculation
Power Calculator
Converting kVA to kW
Converting kW to kVA
Converting kW to HP
Amperes when kVA is known
kVA Required to run motors
Guide to Standard Uints
Kilo Volt Amperes kVA
KiloWatts (1000 watts = 1 kW) kW
Ampere (Volt-Amperes or Current) I
Volts E
Power Factor PE
Percent Efficiency %EFF
Horse Power HP

Power Requirement Calculator
Phase Volts Required
V
Amperes
I
Power
Factor
= Power
kW
1
3
.8
1.0

Converting kW to kVA
kW = kVA
Converting kVA to kW
kVA = kW

Converting kW to HP
kW = HP
What size genset is needed to start a 3 phase electric motor Direct on Line (DOL) start
HP of
Motor
= Generator
kVA Required

Calculating Amperes (when you know kVA)
Phase
1,2,3
Generator
kVA
Volts
Required
= Ampere
I
 

* LEGAL DISCLAIMER: Whenever complex electrical calculations are involved, it is always wise to seek the assistance of a certified electrician. The calculators on this page are offered to assist in generating general estimations only.  In most instances, there are numerous additional factors that should be accounted for (such as altitude, site conditions, iron losses, motor efficiencies, etc.).  If you are still unsure or would like assistance analyzing your current situation, feel free to contact us with your questions.  


Other Useful Tools & Information

Chart with Standard Electrical Formulas

Chart of Approximate Generator Fuel Consumption

Article on How to Size a Generator

If you have questions, already know your requirements, or are interested in purchasing please contact us or browse our extensive inventory of New Surplus Generators and Used Generator Sets to find a standby or prime power genset to meet your needs. 



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