Amperage Calculator for Electrical Engineers and Designers

Distribution SystemDirect Current
Single Phase (Line to Neutral)
Single Phase (Line to Line)
Three Phase

Voltage (Volts) 
Efficiency (%)  
Power Factor  

Kilovolt-amps (kVA), Kilowatt (kW) or Horsepower (HP) to amps (A) calculator

How to use the Amperage calculator.

First select what type of distribution system is being used from the drop down box. Click on a link below to learn more

Direct Current (DC)

Single Phase (L-N)

Single Phase (L-L)


Three Phase


Next Enter the amount of power being required and select if it is kVA, kW or HP. Click on a link below to learn more

Horsepower (HP)

Kilowatt (kW)

Kilovolt-amps (kVA)


Then enter the Voltage that you are using.  See notes for some typical voltages.

If the power required is HP the you will have to add some clarification about it like how efficient it is and what the power factor (PF) is. If you don't know use 100% for efficiency and 1 for PF.

Finally, press the Calculate button.