kVA to Amps Calculator
Convert apparent power in kVA to line current.
Interactive Electrical Calculator
kVA to Amps Calculator
Convert apparent power in kVA to line current.
Result
Enter values and calculate.
About the kVA to Amps Calculator
The kVA to Amps Calculator handles converting between watts, amps, volts, kW, kVA and VA without needing a spreadsheet, app download or manual lookup table. Convert apparent power in kVA to line current. Equipment nameplates, breaker ratings, generator ratings and utility bills rarely all use the same unit, so converting correctly is a routine step in almost every electrical job.
It's built for 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, and every field updates instantly so you can try a few scenarios before committing to a real installation.
How the calculation works
The calculator is built around this relationship:
I = (kVA × 1000) / V; three phase divides by √3.
Where each input maps to a field in the calculator above:
- Apparent Power in kVA.
- Voltage in V.
- System — choose between DC, Single Phase, Three Phase.
Change any field above and the result recalculates immediately — nothing is submitted anywhere, so it's safe to experiment freely.
A worked example
For example, start with 10 kVA for apparent power and 400 V for voltage. Those defaults are only a starting point — replace them with your own measured or nameplate values, then press Calculate to get a result specific to your situation.
When to use the kVA to Amps Calculator
Typical reasons people reach for the kVA to Amps 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: 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.
Also worth knowing: Always check whether the source rating is real power (W/kW) or apparent power (VA/kVA) before converting — they are only equal when power factor is exactly 1.
Frequently asked questions
What does the kVA to Amps Calculator calculate?
Convert apparent power in kVA to line current.
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 kVA to Amps Calculator is completely free, with no account, download or installation required.
Why does this calculation matter in practice?
Power factor and phase count both change the relationship between watts, volt-amps and current, which is where most manual conversion mistakes happen.
What should I do if the result looks off?
The kVA to Amps 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.