Amps to Volt-Amps Calculator
Find apparent volt-amperes from current and voltage. Single-phase VA = V × I. Default 15 A at 120 V gives 1800 VA. Informational only.
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How to convert amps to volt-amps
- Enter amps and volts.
- Pick single-phase or three-phase for the √3 factor.
- Read VA. This is apparent, not real watts.
- Apply PF on VA to kW for kilowatts. Nothing is uploaded.
Amps to volt-amps
VA = V I (with √3 on 3ph)
| Single-phase | VA = V × I |
|---|---|
| Three-phase | VA = √3 V I |
| Default | 15 A × 120 V = 1800 VA |
| Not watts | Needs PF for real power |
| Inverse | Volt-amps to amps page |
| Approval | Informational. Not wire sizing. |
Apparent product
Fifteen amps at 120 V is 1800 VA on single-phase. Three-phase multiplies by √3 in the engine.
Real power
Multiply VA by PF and divide by 1000 on VA to kW for kilowatts.
kVA scale
Divide VA by 1000 for kVA. Compare amps to kVA which reports kilo-scaled apparent power.
When you have real watts
watts to amps uses real power, not apparent VA.
Limits
Balanced AC.
The formula runs in this tab. CZNull does not receive the numbers.
Informational only. Not wiring, code, or manufacturer approval. See the disclaimer.
What VA is 15 A at 120 V single-phase?
1800 VA from V×I.
How is this different from watts?
Watts are real power. VA are apparent unless PF is 1.
Does three-phase change VA?
Yes. The engine uses VA = √3 V I for the 3ph selection.
Can I convert VA to kW here?
No. Use VA to kW with a PF value.