Amps to VA Calculator
Convert amps and volts to apparent power in volt-amperes for single-phase and three-phase electrical systems.
Enter values to calculate.
How to use
Follow these steps for a clear answer.
Enter the current
Type the current in amps for your circuit or equipment.
Enter the voltage
Use the circuit voltage. For three phase, enter line-to-line voltage.
Select the phase
Choose single phase or three phase, then calculate the result.
Example calculations
Common configurations with formula and result.
Single-phase example
15 A at 120 V
Three-phase example
10 A at 400 V
Single-phase example
8 A at 230 V
Conversion reference
| Current | Voltage | Phase type | Formula | Apparent power |
|---|---|---|---|---|
| 5 A | 120 V | Single phase | 5 × 120 | 600 VA |
| 10 A | 230 V | Single phase | 10 × 230 | 2,300 VA |
| 12 A | 230 V | Single phase | 12 × 230 | 2,760 VA |
| 15 A | 230 V | Single phase | 15 × 230 | 3,450 VA |
| 10 A | 400 V | Three phase | √3 × 10 × 400 | 6,928 VA |
| 20 A | 400 V | Three phase | √3 × 20 × 400 | 13,856 VA |
Frequently asked questions
Key distinctions behind the calculation.
What is VA (volt-amperes)?
VA is apparent electrical power. It is the product of RMS voltage and RMS current, without applying power factor.
What is the difference between single-phase and three-phase VA?
Single-phase apparent power is amps multiplied by volts. Balanced three-phase apparent power also includes the square root of three when line-to-line voltage is used.
Do I need power factor to calculate VA?
No. Power factor is used to convert apparent power into real power in watts. VA itself does not require it.
How is VA different from watts?
VA describes apparent power, while watts describe real power actually consumed. Watts equal VA multiplied by power factor.