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Amps to kVA Calculator FullScreen

Convert electrical current in amperes (A) to apparent power in kilovolt-amperes (kVA). Perfect for determining the rating of transformers, generators, and other electrical equipment. Obtain an estimation of apparent power in kVA from amperes using this convenient online tool.

Select phase #:  
Enter amps: A
Enter volts: V
   
Result in kilovolt-amps: kVA

* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12



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What is Amps to kVA Calculator

To convert amps (A) to kilovolt-amps (kVA), you need to know the voltage (V) at which the electrical device operates and the power factor (PF) of the load. The formula for converting amps to kVA is:

kVA = (A x V) / 1000

To use this formula, multiply the amperage (A) by the voltage (V) and divide the result by 1000.

For example, if you have a load with a current of 20 amps and an operating voltage of 240 volts, and the power factor is 0.8, you can calculate the apparent power in kilovolt-amps (kVA) as follows:

kVA = (20 A x 240 V) / 1000 kVA = 4.8 kVA

In this example, the load has an apparent power of 4.8 kilovolt-amps.

Please note that the power factor (PF) plays a significant role in the calculation, as it represents the ratio of real power to apparent power. In cases where the power factor is not provided, it is common to assume a power factor of 1 (unity) for resistive loads or to refer to the specifications of the specific device or system.

Single phase amps to kVA calculation formula

The apparent power S in kilovolt-amps is equal to current I in amps, times the voltage V in volts, divided by 1000:

S(kVA) = I(A) × V(V) / 1000

3 phase amps to kVA calculation formula

Calculation with line to line voltage

The apparent power S in kilovolt-amps is equal to phase current I in amps, times the line to line RMS voltage VL-L in volts, divided by 1000:

S(kVA) = √3 × I(A) × VL-L(V) / 1000 

Calculation with line to neutral voltage

The apparent power S in kilovolt-amps is equal to phase current I in amps, times the line to neutral RMS voltage VL-N in volts, divided by 1000:

S(kVA) = 3 × I(A) × VL-N(V) / 1000

Amps to kVA Calculator Example

To convert Amps (A) to kilovolt-amps (kVA), you need to know the voltage (V) and the power factor (PF) of the electrical system. The formula for this conversion is:

kVA = (Amps × Voltage) / (1000 × Power Factor)

Here's an example that demonstrates the calculation using a calculator:

Let's assume you have a load with a current draw of 50 Amps (A), a voltage of 220 Volts (V), and a power factor of 0.9:

kVA = (50 A × 220 V) / (1000 × 0.9 PF) ≈ 122.22 kVA

Therefore, with a current draw of 50 Amps, a voltage of 220 Volts, and a power factor of 0.9, the apparent power or kVA would be approximately 122.22 kVA.

Please keep in mind that the power factor (PF) represents the efficiency and phase relationship between the voltage and current. It ranges from 0 to 1, and a value close to 1 indicates higher efficiency. Different types of loads have different power factors, and it's important to consider the specific power factor of the load or use an average value if it's unknown. Also, note that the apparent power (kVA) represents the total power consumed by the load, including both the actual power (kW) and the reactive power (kVAR) components.