What this calculator actually models
kVA is apparent power, so converting kVA to current does not require power factor. The required denominator depends on phase configuration and on whether a balanced three-phase voltage is entered line-to-line or line-to-neutral.
How to use this calculator
Choose single-phase or balanced three-phase.
Enter apparent power in kVA and the applicable voltage.
For three-phase, select whether the entered voltage is line-to-line or line-to-neutral, then verify the convention against the equipment data.
Where people use it
- •Transformer and generator apparent-power checks
- •Comparing current at different system voltages
- •Electrical training and nameplate sanity checks
Example: 10 kVA at 400 V three-phase line-to-line
Current is 10,000 ÷ (√3 × 400), which is about 14.43 A for the balanced apparent-power relationship.
Assumptions and limits
- •This is an apparent-power calculation, not a conductor, breaker, fuse or protection recommendation.
- •Three-phase mode assumes a balanced system. Real equipment can require efficiency, harmonics, inrush, derating and code considerations beyond this formula.
Frequently asked questions
Why is there no power-factor input?+
kVA is apparent power. Power factor is needed when converting between apparent power and real power, not when converting kVA directly to current from voltage.
Which three-phase voltage should I enter?+
Choose the matching formula: line-to-line voltage uses √3 × VLL, while line-to-neutral voltage in a balanced wye relationship uses 3 × VLN.
Can this size a breaker or cable?+
No. Current from an ideal power relationship is only one input to an installation design.
Semantic next steps
Continue the calculation
These links move to a different input, formula or project stage rather than a keyword variation of this page.
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