How to convert VA to amps

Apparent power in volt-amps (VA) to electric current in amps (A).

You can calculate amps from volt-amps and volts, but you can't convert volt-amps to amps since volt-amps and amps units do not measure the same quantity.

Single phase VA to amps calculation formula

The current I in amps is equal to the apparent power S in volt-amps (VA), divided by the RMS voltage V in volts (V):

I(A) = S(VA) / V(V)

So amps are equal to volt-amps divided by volts.

amps = VA / volts

or

A = VA / V

Example

Question: What is the current in amps when the apparent power is 3000 VA and the voltage supply is 110 volts?

Solution:

I = 3000VA / 110V = 27.27A

3 phase VA to amps calculation formula

The current I in amps is equal to the apparent power S in volt-amps (VA), divided by the square root of 3 times the line to line voltage VL-L in volts (V):

I(A) = S(VA) / (√3 × VL-L(V) )

So amps are equal to volt-amps divided by the square root of 3 times volts.

amps = VA / (√3 × volts)

or

A = VA / (√3 × V)

Example

Question: What is the current in amps when the apparent power is 3000 VA and the voltage supply is 110 volts?

Solution:

I = 3000VA / (√3 × 110V) = 15.746A

 

How to convert amps to VA ►

 

See also

ELECTRICAL CALCULATIONS
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