kVA to Amps Calculator
Convert kilovolt-amps (kVA) to amperes (A) instantly. This calculator supports both single-phase and three-phase electrical systems, essential for sizing circuit breakers and cables.
Input Parameters
Apparent power in kilovolt-amperes
Line-to-line voltage (RMS). For single-phase use line-to-neutral or line voltage as applicable.
Calculation Results
How to Calculate Amps from kVA
Single Phase Formula:
I(A) = S(kVA) × 1000 / V(V)
Three Phase Formula:
I(A) = S(kVA) × 1000 / (� × V(V)) = S(kVA) × 1000 / (1.73205 × V(V))
Where I is current in amperes, S is apparent power in kVA, and V is line-to-line voltage in volts.
Common kVA to Amps Conversion Table (at 400V, 3-Phase)
| kVA | Amps |
|---|---|
| 1 | 1.44 |
| 5 | 7.22 |
| 10 | 14.43 |
| 50 | 72.17 |
| 100 | 144.34 |
Values calculated with I = kVA × 1000 / (� × 400).
Frequently Asked Questions
What is the 3-phase kVA to Amps formula?
The formula is I = (kVA × 1000) / (1.732 × V). Where I is current in Amps, V is line-to-line voltage in Volts. The factor 1.732 is �.
What voltage should I use for single-phase vs three-phase?
For single-phase, use the voltage across the load (e.g. 120V or 230V). For three-phase, use the line-to-line voltage (e.g. 400V, 480V).