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Last updated: July 20, 2025

Watts to kVA Calculator: Convert Watts to Apparent Power Easily

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Watts to kVA Calculator

W
KVA

Watts To KVA Calculator

Use this free Watts to kVA Calculator to convert real power (watts) into apparent power (kVA) for AC circuits. Fast, accurate tool with formula, table, and examples.

Quick Intro: Convert Watts to KVA

To convertwatts to kVA, divide the power in watts by1000 × power factor. This conversion helps estimate the apparent power (kVA) from real power (watts) in AC circuits. Our calculator uses this formula to give accurate results for both single-phase and three-phase systems. Simply input your wattage and power factor, and get the corresponding kVA value instantly. Ideal for generators, UPS systems, and load planning.

Formula & Table Summary

Watts to kVA Formula

kVA = Watts ÷ (1000 × Power Factor)

  • Watts= real power
  • Power Factor (PF)= typically between 0.6–1.0
  • kVA= apparent power

What do you need to know to calculate AC KVA?

TheWatts to kVA Calculatoris a simple tool to convert real power (watts) into apparent power (kilovolt-amperes or kVA) in AC electrical systems. It’s especially useful for electrical engineers, electricians, and students working with load calculations or generator sizing.

To convert watts to kVA, you need to know the power factor (PF). The formula is:kVA = Watts ÷ (1000 × Power Factor). This calculator supports single-phase and three-phase systems. By entering the watt value and the power factor, it gives you the kVA result instantly—no manual calculation needed.

The calculator also shows a sample conversion table and the formula used. It's mobile-friendly, fast, and 100% free to use.

Watts to KVA Conversion Chart

WattsPower FactorkVA (Result)
10001.01.00 kVA
20000.82.50 kVA
30000.74.29 kVA
50000.95.56 kVA
100000.616.67 kVA

Frequently Asked Questions - Watts To KVA Calculator:

What is the formula to convert watts to kVA?

The formula is: kVA = Watts ÷ (1000 × Power Factor).

Why is power factor important in this conversion?

Power factor adjusts for the phase difference between voltage and current in AC systems.

What is a good default power factor?

A typical default value is 0.8 for industrial and commercial loads.

Is this calculator suitable for single and three-phase systems?

Yes, it works for both, just ensure the correct power factor is used.

What does kVA stand for?

kVA stands for kilovolt-amperes, the unit of apparent power.

Can I convert kW to kVA?

Yes, if you know the power factor: kVA = kW ÷ Power Factor.

Is there a mobile version of this calculator?

Yes, it’s fully responsive and mobile-friendly.

Is power factor always less than 1?

Yes, it ranges between 0 and 1 in real-world AC circuits.

Why convert watts to kVA?

To size generators or UPS systems, which are often rated in kVA.

Is this tool free to use?

Absolutely, it’s 100% free with no signup required.

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Md. Jony Islam is a highly skilled professional with expertise in electronics, electrical, mechanical, and civil engineering, as well as finance. Specializing intransformer service and maintenance for 33/11kV substations, he ensures reliable and efficient electrical systems. His mechanical engineering skills drive innovative designs, while his financial acumen supports effective project budgeting. With a strong foundation in civil engineering, he contributes to robust infrastructure development. Md. Jony Islam's multidisciplinary approach ensures efficiency, quality, and reliability across all projects.