Amps to kVA Calculator
Convert Amps to kVA with the formula, a worked example and a table of typical values. Working shown step by step.
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Estimate only. Not engineering or safety advice. Check the result against the applicable standard and the equipment data, and have a competent engineer review it before it is relied on. Terms of use.
Open in the calculator with these values
Formula
Worked example
| Input | Value |
|---|---|
| Line current | 100 A |
| Voltage | 415 V |
| Current type | Three-phase AC |
| Voltage type (three-phase only) | Line-to-line (L-L) |
- S = √3 × 415 × 100 = 71.8801 kVA
Typical values
| Line current (A) | Apparent power (kVA) |
|---|---|
| 5 | 3.59 |
| 10 | 7.19 |
| 20 | 14.38 |
| 50 | 35.94 |
| 100 | 71.88 |
| 200 | 143.76 |
| 500 | 359.4 |
Other inputs are the same as in the worked example above.
Assumptions
- Balanced load
- V is line-to-line RMS for three-phase unless line-to-neutral is chosen
- For DC, kVA is the same as kW
Power factor does not enter apparent power.
Frequently asked questions
How do I convert Amps to kVA?
S = √3 × V × I (three-phase L-N: 3 × V × I; single-phase and DC: V × I). Worked example: Line current 100 A, voltage 415 V, current type Three-phase AC gives 71.88 kVA.
What do I need to enter?
Enter line current, voltage and current type. Change the unit of a value with its selector and the result stays the same.
Does single-phase or three-phase change the answer?
Yes. Pick the circuit type that matches the supply. Three-phase uses √3 with the line-to-line voltage, single-phase uses the voltage as it is, and DC, where it is offered, takes the power factor as 1. The formula above shows each case.
Does power factor change the answer?
No. Apparent power depends only on voltage and current (with √3 for three-phase), so the power factor does not enter. It matters when you convert to kW or watts.
How accurate are the results?
Every figure comes from the same tested engine as the Elecmetric calculators and is meant for estimating. Check design values against the standard and the equipment data you work to.
Related
Next steps in a design: Amps to kWkVA to Amps
Opposite direction: kVA to Amps
Also see: Amps to VA VA to Amps Amps to Volts Volts to Amps
Formula guides: Three-Phase Power FormulasPower Factor and the Power Triangle
All 78 conversionsAmps to kVA in Elecmetric