Single-Phase Amps to kVA Calculator
Quick explanation
Use amps and voltage to estimate apparent power in kVA. For the reverse flow, use kVA to amps, and cross-check real power with amps to watts.
Estimated apparent power: 7.2 kVA
How to convert single-phase amps to kVA
To estimate apparent power in kVA from amps, include voltage and the correct phase model. Amps and kVA are different electrical quantities, so voltage and system type are required.
This calculator uses the single-phase relationship only. For three-phase conversions, use a dedicated three-phase calculator.
How to convert
Single-phase formula
Apparent power in kVA equals amps multiplied by volts, divided by 1000.
kVA = (A × V) / 1000
Worked examples
Question: What is apparent power for 25 A at 240 V single phase?
Solution: kVA = (25 × 240) / 1000 = 6.0 kVA
Question: What is apparent power for 30 A at 240 V single phase?
Solution: kVA = (30 × 240) / 1000 = 7.2 kVA
Common mistakes and notes
- kVA is apparent power; kW is real power and depends on power factor.
- This page is single-phase only.
- Final sizing should be validated with local code and manufacturer specs.
Assumptions
- REVIEW: Uses simplified single-phase estimate kVA = (A x V) / 1000.
- Power factor and three-phase relationships are excluded.
- Results are informational estimates and require engineering validation.
Worked example
Example: 30 A at 240 V = 7.2 kVA.
FAQ
How do you convert amps to kVA?
Use kVA = (A x V) / 1000 for a single-phase estimate.
What is 25 A at 240 V in kVA?
25 x 240 / 1000 = 6 kVA.
Is kVA the same as kW?
Not always. kW depends on power factor; kVA is apparent power.
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⚠️ Sanity Check Only
This tool provides informational estimates only. It is not professional engineering advice. Electrical work is dangerous and governed by strict local codes.
Before you start:
- Verify these results with a licensed electrician.
- Cross-reference with the latest Electrical Code (NEC/CEC).
- Never work on live circuits.