Formula & Info

Electrical Power Conversion

This page provides range of electrical formula to convert the electrical units into another electrical units. These formulas are able to help you determine the suitable generator size for your application.

 

Units and Notation

 

Voltage, V

 

volt

 

V

 

 

Current, I

 

ampere

 

A

 

 

Power

 

kilovolt-Ampere

 

kVA

 

 

 

kilowatt

 

W

 

 

 

horsepower

 

hp

 

 

Power Factor

 

Power factor

 

PF

 

 

Efficiency, η

 

percentage

 

%

 

 

 

Shortcut conversion for 3 Phase, 415V, 50Hz, 0.8PF voltage supply only.

kVA

= kW x 1.25
= I x 0.72

kW

= kVA x 0.8
= I x 0.58

I

= kVA x 1.39
= kW x 1.74

Actual Conversion Formula:

 

UNIT

 

SINGLE PHASE

 

THREE PHASE

 

 

Kilovolt-Ampere (kVA)

 

V × I
1000

 

V × I × √3
1000

 

 

Kilowatt (kW)

 

V × I × PF
1000

 

V × I × √3 × PF
1000

 

 

Ampere (kVA is known)

 

kVA × 1000
V

 

kVA × 1000
V × √3

 

 

Ampere (kW is known)

 

kW × 1000
V × PF

 

kW × 1000 
V × √3 × PF

 

 

Ampere (hp is known)

 

hp × 746
V × PF × η

 

hp × 746
V × √3× PF × η

 

 

Horsepower (hp)

 

V × I × PF × η
746

 

V × I × √3 × PF × η
746

 

 

Electrical Power Conversion Calculator

We have develop an electrical unit conversion calculator to provide a hassle free calculation in order to determine the correct generator size for every purpose.

Click here to download the calculator.