kW to kVA Converter Calculator

Calculator Form

Load Name

Application Type

Real Power (kW)

Power Factor

Headroom (%)

Decimal Places

Reset

Formula Used

Primary formula: kVA = kW ÷ Power Factor

Reverse formula: kW = kVA × Power Factor

Apparent power in VA: VA = kVA × 1000

Real power in kilowatts becomes apparent power in kilovolt-amperes when divided by the load power factor. Lower power factor means more kVA is needed for the same useful kW output.

How to Use This Calculator

Enter a descriptive load name for easier reporting.
Select the application type that matches your sizing task.
Enter the real power value in kilowatts.
Provide the expected power factor between 0 and 1.
Set optional headroom for safer equipment selection.
Choose your preferred decimal precision.
Click Convert Now to display the result above the form.
Use the CSV and PDF buttons to export the report.

Example Data Table

Load	kW	Power Factor	kVA
Office Floor	25.00	0.95	26.32
Workshop Panel	45.00	0.85	52.94
Pump Load	75.00	0.80	93.75
Compressor	110.00	0.78	141.03
Mixed Facility	150.00	0.90	166.67

These examples show how the same sizing logic behaves across different power factors and loads.

Frequently Asked Questions

1) What does this calculator convert?

It converts real power in kilowatts into apparent power in kilovolt-amperes by using the entered power factor. This is useful for selecting generators, transformers, UPS systems, and other electrical equipment.

2) Why is power factor required?

Power factor links real power and apparent power. Without it, a kW value alone cannot determine the required kVA. Lower power factor always produces a higher kVA requirement for the same load.

3) What happens when power factor decreases?

Required kVA rises as power factor drops. For example, 100 kW at 1.00 PF needs 100 kVA, while 100 kW at 0.80 PF needs 125 kVA.

4) Is this enough for generator sizing?

It is a solid first estimate. Final generator sizing may also need starting current, voltage dip limits, harmonics, future expansion, ambient conditions, and site-specific engineering checks.

5) Why add headroom?

Headroom helps cover uncertainty, future growth, and operating margin. It can reduce undersizing risk when selecting equipment that should not run continuously at its absolute limit.

6) Does voltage or phase change the formula?

Not for this specific conversion. kW-to-kVA depends on power factor. Voltage and phase become important when calculating current, conductor size, breaker rating, or full load amps.

7) Can I use this for three-phase systems?

Yes. If you already know the total kW and realistic power factor, the conversion to kVA is the same. Three-phase details matter in current calculations, not this direct relationship.

8) What is a typical power factor value?

Many commercial and industrial loads operate around 0.80 to 0.95. Motors and mixed inductive loads often run lower, while corrected systems can approach 1.00.