kVa To Amps Calculator: How To Convert kVa To Amps? (+3 Examples)

kVA (kiloVolt-Ampere) is a compounded unit. It’s comprised of both electrical potential (Volts) and electrical current (Amps). 1 kVA is a frequently used unit; it represents 1,000 Volt-Amperes. In many cases, it’s useful to convert kVA to amps.

The most common question here is ‘How many amps is x kVA’. To calculate the amps, we have to use the kVA formula:

I (Amps) = S (VA) / V (Volts)

S stands for apparent power; the very thing that is measured is Volt-Amperes (VA). Essentially, you might have already figured out that Volt-Ampere is equivalent to a Watt (1 W = 1 A*V = 1 AV).

Using this formula, we have prepared a calculator to convert kVA into amps. Here’s the short summary for 1 kVa for 120-volt, 22o-volt, and 12-volt (battery) circuits:

1 kVa to amps (120V) = 8.33 A

1 kVa to amps (220V) = 4.55 A

1 kVa to amps (12V) = 83.33 A

Below the calculator, you will find a kVA to amps table (you have to know the voltage – usually 220 V), as well as 2 solved examples of how to convert kVA to amps. You can use it here:

kVA To Amps Calculator (With Table)


Now we can calculate a kVA to amps table:

kVA (Apparent Power) Voltage (220 V) Amperage (A)
How many amps is 1 kVA? 220 V 4.55 Amps
How many amps is 5 kVA? 220 V 22.73 Amps
How many amps is 10 kVA? 220 V 45.45 Amps
How many amps is 20 kVA? 220 V 90.91 Amps
How many amps is 30 kVA? 220 V 136.36 Amps
How many amps is 45 kVA? 220 V 204.55 Amps
How many amps is 60 kVA? 220 V 272.73 Amps
How many amps is 90 kVA? 220 V 409.09 Amps
How many amps is 120 kVA? 220 V 545.45 Amps

To demonstrate how the kVA to amps calculation works, let’s look at these 3 examples:

Example 1: How Many Amps Is A 65 kVA Generator?

One common example when kVA to amps conversion is relevant is a generator. For example, you have the Americas Generators 65 kVA generator (on 220 V) and want to know how many amps you can get from that.

Let’s use the kVA to amps calculator above to answer that:

As we can see, a 65 kVa generator at 220 V can create an almost 300 Amp current.


Example 2: What Is 1 kVA In Amps?

To calculate the amps for yourself, it’s useful to know what is 1 kVA in amps. Of course, this depends on the voltage you’re using as well. Let’s say we have a standard voltage (220 V). Here is how many amps you get from a 1 kVA device:

You can use this information to calculate how many amps you get from devices with multiple kVA.

Example 3: Generator For 5,000 BTU Air Conditioner

Let’s say that you have a small portable air conditioner with 5,000 BTU and you’re looking to buy a generator to run it. 5,000 BTU AC unit needs about 500 W of electrical energy. That means you’ll need a 0.5 kVA generator. How many amps will it draw? Let’s find out:

As you can see, if the generator has 220 V voltage, it will create 2.27 amps of electrical current.

Another example is how many amps does a 100 kVA generator produce? A 100 kVA generator produces 833.33 amps at 120V voltage.

With this, you have all you need to convert kVA to amperes. If you have any questions, you can pose them in the comments below.

20 thoughts on “kVa To Amps Calculator: How To Convert kVa To Amps? (+3 Examples)”

    • Hello Kevin, kWh is a unit of energy (Equation: E (kWh) = P (kW) * t (h)), amps are a unit of current (Equation: I = P/V). If we combine the equations we get E = I * (V * t), expressing I = E / (V * t). You can calculate kWh to amps; you need to know the voltage (V) and time (t) of how long the unit was operating.

      Example: An air conditioner spends 50 kWh per day (24 hours) running at 220V. How many amps is that? I = 50 kWh / (0.22 kW * 24 h) = 9.47 amps.

      It’s a bit complicated but that’s that. If you have any specific case, we can solve it here.

  1. please, do you have electrician guide? be it E – or hardcopy to help me. I need to learn a whole lot especially calculations and conversions. Thanks

  2. 80 KVA Perkins generator 220 voltage 3 phase
    How many Amps I can get maximum to use for residential building

    • Hello Abdul, for 3-phase circuits, it’s best to use this 3-phase power calculator. Basically, you have to add a 1.73 factor for a 3-phase circuit (presuming the power factor is 1).

      In your case, the 80 kVA 220V generator would produce 363.64 amps if you use a 1-phase circuit. With a 3-phase circuit, you have to divide the amps by 1.73, yielding 210.20 amps. Hope this makes sense.

  3. thanks. how to determine the minimum source for such transformer. For example if I use a 30KVA transformer to upgrade 110V 3 phase to 220v 3 phase, what is the minimum ampere source to start with?

    • Hi there, when you double the voltage (from 110V to 220V), the amperage is usually halved. However, this is a 3-phase current, and 3 phase power equation applies (it’s not all that easy to calculate this). It might be useful to call an electrician in this situation.


Leave a Comment