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Watts to kVA calculator FullScreen

Convert real power in watts (W) to apparent power in kilovolt-amperes (kVA). Ideal for understanding the total power requirements of electrical systems and equipment. Obtain an estimation of kilovolt-amperes from watts using this practical online tool.

Enter watts: W
Enter power factor:  
Result in kilovolt-amps: kVA


What is Watts to kVA calculator

To convert watts (W) to kilovolt-amperes (kVA), you need to consider the power factor (PF) of the electrical circuit. The relationship between watts, kilovolt-amperes, and power factor is given by the formula:

kVA = Watts / (1000 * Power Factor)

To calculate the kilovolt-amperes, divide the power in watts by 1000 times the power factor.

For example, if you have a device with a power consumption of 5000 watts (W) and a power factor of 0.9, you can calculate the kilovolt-amperes as follows:

kVA = 5000 W / (1000 * 0.9) kVA ≈ 5.56 kVA

In this example, the device would require approximately 5.56 kilovolt-amperes.

The power factor represents the efficiency or quality of power utilization in the electrical system. A power factor of 1 (unity) indicates a purely resistive load where voltage and current are in phase. For loads with reactive components such as inductive or capacitive elements, the power factor may be lower than 1, resulting in an increased kVA requirement compared to the wattage alone.

It's important to note that for circuits with complex loads or non-linear devices, the relationship between watts and kVA becomes more intricate and may involve considerations of harmonic content and additional factors such as crest factor and distortion power factor.

Watts to kVA calculation

The apparent power S in kilovolt-amps (kVA) is equal to the real power P in watts (W), divided by 1000 times the power factor PF:

S(kVA) =  P(W) / (1000 × PF)

Watts to kVA calculator Example

To convert watts (W) to kilovolt-amps (kVA), you also need to consider the power factor (PF) of the load. The formula for calculating kVA from watts and power factor is:

kVA = W / (1000 * PF)

Here's an example table that demonstrates how to calculate kVA from different wattage values and power factors:

Watts (W) Power Factor (PF) kVA
100W 0.8 0.125 kVA
200W 0.9 0.222 kVA
150W 0.85 0.176 kVA
75W 0.95 0.079 kVA

In this example, we assume various power factors for different loads. To calculate the kVA, divide the given watts by (1000 * PF). For example, if you have 100W of power with a power factor of 0.8:

kVA = 100W / (1000 * 0.8) kVA = 0.125 kVA

Therefore, for 100W and a power factor of 0.8, the kVA is 0.125 kVA.

Perform the same calculation for the other examples in the table using the provided wattage and power factor values to obtain the apparent power in kilovolt-amps (kVA).

Remember, kVA represents the apparent power in an electrical system, which takes into account the power factor (PF) to account for any reactive power present in the load.