Amps to kVA Calculator
Find apparent kVA from line current and voltage. Single-phase kVA = V × I / 1000. Default 20 A at 240 V gives 4.8 kVA. Informational only.
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How to convert amps to kVA
- Enter current in amps and line voltage.
- Choose single-phase or three-phase.
- Read kVA. This is apparent power, not real kW.
- Apply PF on kVA to kW if you need kilowatts. Nothing is uploaded.
Amps to kVA
kVA from V and I
| Single-phase | kVA = V I / 1000 |
|---|---|
| Three-phase | kVA = √3 V I / 1000 |
| Default | 20 A × 240 V / 1000 = 4.8 kVA |
| Apparent | Product of V and I scale without PF |
| Inverse | kVA to amps page reverses the job |
| Approval | Informational. Not a panel schedule. |
Apparent product
Single-phase kVA is volts times amps divided by 1000. Twenty amps at 240 V is 4.8 kVA before power factor splits real vs reactive.
Power factor next step
Real kW = kVA × PF on the kVA to kW page. A meter may show kVA and PF separately.
VA vs kVA
Small loads may use volt-amps on amps to volt-amps without the kilo prefix.
Real power from watts
DC or unity-PF resistive loads sometimes start from watts on watts to kVA.
Limits
Balanced AC model.
The formula runs in this tab. CZNull does not receive the numbers.
Informational only. Not wiring, code, or manufacturer approval. See the disclaimer.
What kVA is 20 A at 240 V single-phase?
4.8 kVA from V×I/1000.
Does PF change kVA from amps?
Not on this page. PF converts kVA to kW after you have apparent power.
Which voltage for three-phase?
Use the line-to-line voltage your diagram labels for 3ph, matching the engine note.
Is this the same as kW?
Only at PF = 1. Otherwise kVA is larger than kW for typical lagging loads.
Where is DC handled?
DC real power uses watts and volts on other pages; kVA is an AC apparent concept.