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kVA to Amperage Calculator

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How to convert kVA to ampsHow to use our kVA to amperage calculatorOther related calculatorsFAQs

This kVA to amperage calculator will help you determine the electric current strength an alternating current system experiences at specific power and voltage loads. With this calculator and by the end of this text, you will be able to:

  • Learn how to convert kVA to amps;
  • Explore the formulas to convert kVA to amps; and
  • Perform kVA to amperage conversions with ease.

How to convert kVA to amps

By dimensional analysis, we can conclude that the unit for the apparent power, kVA or kilovolt-amperes is, in essence, a product of voltage in kilovolts and current in amperes. To find the amperage in a given electrical system with a known apparent power in kVA, we simply have to divide the kVA value by the amount of voltage present in the system. We can express that in equation form as shown below:

I=SV,I = \frac{S}{V},


  • II - Amperage in amperes;
  • SS - Apparent power in kilovolt-amperes; and
  • VV - Voltage in kilovolts;

Coincidentally, the formula to convert kVA to amperes shown above also happens to be the formula we can use to find the amperage in a single-phase power system. On the other hand, to find the amperage in a 3-phase power system, we only have to multiply the voltage by 3\small \sqrt{3} for a line-to-line voltage or multiply the voltage by 3\small 3 for a line-to-neutral voltage. With that said, our 3-phase kVA to amps calculation formulas would be:

For 3-phase line-to-line

I=S3×VI = \frac{S}{\sqrt{3} \times V}\\[2.0em]

For 3-phase line-to-neutral

I=S3×VI = \frac{S}{3 \times V}

Now that we know our single-phase and 3-phase kVA to amps calculation formulas, how about we discuss how to use our kVA to amperage calculator? 🙂

🙋 For voltage values in volts, we can multiply the apparent power in kVA by 1000 to convert it to volt-amps (VA). Therefore, by dividing the apparent power in volt-amps by volts, we get amperes.

How to use our kVA to amperage calculator

This kVA to amps calculator is very straightforward to use. Here are the steps to follow in using our kVA to amperage calculator:

  1. First, select the load distribution of your electrical system.
  2. Then, enter the apparent power your system requires.
  3. Finally, input the voltage applied by the provided electricity.

Upon completing these steps, you'll instantly find the amperage value running through your electrical system. That's how fast our calculator performs kVA to amperage conversions.

If, instead of the apparent power, you happen to know the power factor and real power of your electrical system, you can enter values for those parameters by clicking on the Other input values heading of our calculator.


How many amps can a 50 kVA transformer handle?

A 50 kVA transformer can handle around 120.28 amperes at 240 volts 3-phase. To calculate that value, we:

  1. First convert 50 kVA to 50,000 VA by multiplying 50 kVA by 1,000.
  2. Then divide 50,000 VA by 240 volts to get 208.333 amperes.
  3. Finally, we divide 208.333 amperes by √3 or 1.73205 to obtain 120.28 amperes.

How do I convert amps to kVA?

To convert amps to kVA in a single-phase power system, you can use the formula S = I × V / 1000 where the amperage (I) is in amperes, the voltage (V) is in volts, and the resulting apparent power (S) is in kilovolt-amperes or kVA. On the other hand, for the 3-phase system, you can use S = I × V × √3 / 1000 for line-to-line voltage and S = I × V × 3 / 1000 for line-to-neutral voltage.

How many kVA is 30 amps?

An electrical system drawing 30 amps at 220 V results in 11.43 kVA of apparent power. We can calculate that by multiplying 30 amps by √3 or 1.73205 to get 51.96152 amps. After that, we multiply our product by 220 V to have 11,431.53 VA. Dividing our final product by 1,000 or by moving its decimal point three steps to the left, we arrive at our final answer of 11.43 kVA.

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