kW to kVA Calculator
Convert real power in kW to apparent power in kVA using power factor.
Interactive Electrical Calculator
kW to kVA Calculator
Convert real power in kW to apparent power in kVA using power factor.
Result
Enter values and calculate.
About the kW to kVA Calculator
Use the kW to kVA Calculator below to work through converting between watts, amps, volts, kW, kVA and VA in seconds, right in your browser. Convert real power in kW to apparent power in kVA using power factor. Getting a conversion wrong by even a small factor can lead to an oversized bill of materials or, worse, a breaker or cable that is undersized for the real current.
It's aimed at electricians sizing breakers and cable, solar and generator installers matching equipment ratings, and anyone reading a nameplate that lists one unit when they need another, who need a fast, reliable number without redoing the math by hand each time.
How the calculation works
Behind the scenes, the calculation follows:
kVA = kW / PF.
Where each input maps to a field in the calculator above:
- Real Power in kW.
- Power Factor.
Every one of these values can be edited above, and the calculator updates the result the moment you press Calculate.
A worked example
For example, start with 10 kW for real power and 0.9 for power factor. That's a reasonable starting point to explore from: nudge one value up or down and watch how much the result shifts before you commit to a final design figure.
When to use the kW to kVA Calculator
Typical reasons people reach for the kW to kVA Calculator:
- Converting a nameplate wattage to the amp draw needed to size a breaker or extension cord.
- Turning a generator or UPS kVA rating into the real kW load it can actually support.
- Checking a utility bill or inverter spec sheet that mixes kW, kWh and kVA.
- Working out current draw for a three-phase motor or panel from its power rating.
Good practice: Three-phase conversions use a √3 factor that single-phase and DC calculations do not, so double check which system you are working with.
Also worth knowing: A typical inductive load (motors, transformers, some electronics) has a power factor below 1, which means its current draw is higher than a simple watts ÷ volts calculation suggests.
Frequently asked questions
What does the kW to kVA Calculator calculate?
Convert real power in kW to apparent power in kVA using power factor.
Can I rely on this number for a real installation?
The formula above is applied exactly to the values you enter, so the math itself is precise. Real-world results can still differ due to component tolerances, temperature, installation method, equipment efficiency and local code requirements, so treat the output as a strong planning estimate and verify final designs against manufacturer data and the electrical code that applies to your installation.
Is this calculator free to use?
Yes. The kW to kVA Calculator is completely free, with no account, download or installation required.
What happens if I get this wrong?
Getting a conversion wrong by even a small factor can lead to an oversized bill of materials or, worse, a breaker or cable that is undersized for the real current.
Will this work for both metric and everyday values?
The kW to kVA Calculator works on any modern browser, phone or desktop, and recalculates as soon as you press Calculate. If a result looks off, double-check that every field is filled in with the unit shown next to it (mixing up units, such as W with kW, is the most common cause of an unexpected answer) and re-enter the values.