What is the amps to VA formula?
Single-phase VA equals amps multiplied by volts. Balanced three-phase VA also includes √3.
Volt-ampere conversion
Amps to VA Calculator
Calculate apparent power in volt-amperes from current and voltage for single-phase and balanced three-phase AC equipment.
Interactive calculator
Amps to VA Calculator
Result
2300.00 VA
VA = A × V
Live circuit diagram
Amps to VA Calculator visualized in real time
Values update as you use the calculator.
Input
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Calculated output
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Quick answers
Amps to VA Calculator: quick answers
Get concise answers to the most common amps to va calculator questions before reviewing the formulas, examples, and detailed guidance below.
What is 10 A at 230 V in VA?
For single-phase AC, it equals 2300 VA.
Is VA the same as watts?
Only when power factor equals 1. VA is apparent power; watts are real power.
Formula
Amps to VA formulas
Choose the formula that matches the electrical system and known values.
Single-phase AC
VA = A × V
Current multiplied by RMS voltage gives apparent power.
Three-phase AC
VA = √3 × A × V
Use line current and line-to-line voltage.
VA to kVA
kVA = VA ÷ 1000
One kilovolt-ampere equals 1000 volt-amperes.
How to use
Calculate in five clear steps
Check every unit and use measured or nameplate values where possible.
- 1. Choose the correct phase arrangement.
- 2. Enter current in amperes.
- 3. Enter RMS operating voltage.
- 4. Review the result in volt-amperes.
- 5. Check surge, power factor, and derating separately.
Worked examples
Practical calculation examples
Examples make the formula and its assumptions easier to verify.
1 A at 120 V, single phase
120 VA
5 A at 230 V, single phase
1,150 VA
10 A at 230 V, single phase
2,300 VA
10 A at 400 V, three phase
6,928.20 VA
20 A at 415 V, three phase
14,376.02 VA
32 A at 480 V, three phase
26,604.30 VA
Accuracy
Common mistakes and limitations
The result is only as reliable as the selected formula and input data.
Conversion library
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Continue from the Amps to VA Calculator to a dedicated conversion tool for watts, amps, volts, kW, kVA, energy, batteries, or circuit calculations. Each linked page includes its own formula, examples, and guidance.
FAQ
Amps to VA questions
Direct answers to common calculation questions.
What is the amps to VA formula?
Single-phase VA equals amps multiplied by volts. Balanced three-phase VA also includes √3.
What is 10 A at 230 V in VA?
For single-phase AC, it equals 2300 VA.
Is VA the same as watts?
Only when power factor equals 1. VA is apparent power; watts are real power.
Is power factor needed for VA?
No. Power factor is needed to convert VA into watts.
How many VA are in one kVA?
There are 1000 VA in 1 kVA.
Can I use this for a UPS?
Yes for a steady-load estimate, but also check watts, surge, runtime, and manufacturer limits.
Can I use it for a transformer?
It estimates load VA; final selection also requires demand, temperature, harmonics, and code checks.
Why use RMS voltage?
RMS is the effective AC voltage used in standard apparent-power equations.
Does three phase use line voltage?
Yes. Enter line-to-line voltage for this balanced three-phase formula.
Does the result include efficiency?
No. Losses and efficiency require separate analysis.
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