Electrical Power Calculators


Guide to Standard Units
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