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kVA to kW Conversion Calculator

Convert kVA to kW instantly. Calculate real power (kW) from apparent power (kVA) using the power factor. Essential for generator and electrical system sizing.

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Formula

kW = kVA × Power Factor

Multiplies the apparent power (kVA) by the efficiency or power factor of the electrical system to find the usable real power (kW).

Worked Example

A 100 kVA generator with a standard 0.8 power factor provides 80 kW of real power.

Understanding Electrical Power Conversion

Choosing the right generator or UPS requires understanding the difference between total and usable power.
  • kVA is the total capacity of the system.
  • kW is what your equipment actually consumes.
  • Always check your equipment labels for the specific power factor if possible.

Contact an electrician for precise loading and phase balancing requirements.

You can also calculate changes using our Generator Fuel Consumption Calculator or Electricity Bill Calculator.

Frequently Asked Questions

What is the difference between kVA and kW?

kVA is apparent power (total power in the system), while kW is real power (usable energy that does work).

What is a standard power factor?

For most industrial generators and electrical equipment, 0.8 is the accepted industry standard power factor.

How do I convert kW back to kVA?

Divide the kW by the power factor (kVA = kW / PF).

Why is kW usually less than kVA?

Electrical systems are rarely 100% efficient due to reactive power, so some "apparent" power is lost to the system.

Can power factor be 1.0?

Yes, this is called "unity power factor" and typically occurs in purely resistive loads like heaters or incandescent bulbs.

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