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Amps to Volt-Amps Calculator

Convert current into apparent power in volt-amps for single-phase or three-phase AC using the entered supply voltage, with supporting kilovolt-amps and the phase-specific working equation.

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Conversions

Amps to volt-amps calculator: convert current into apparent power

An amps to volt-amps calculator converts current into apparent power for single-phase or balanced three-phase AC systems when you know the supply voltage. It is useful for translating a current estimate into the VA language used on smaller equipment labels, control gear, and early planning notes without losing the connection to the larger kVA scale.

What this amps to volt-amps calculator solves

This page converts current in amps into apparent power in volt-amps using the selected AC system and the entered voltage. Single-phase mode multiplies amps by voltage directly, while balanced three-phase mode applies the square-root-of-three factor tied to line-voltage apparent-power relationships.

That makes it useful when a current estimate needs to be compared against equipment or documentation that uses VA rather than kVA, while the supporting kVA figure keeps the same apparent power visible at the larger scale.

The apparent-power formulas behind the result

In single-phase AC, apparent power in volt-amps equals current multiplied by voltage. In balanced three-phase AC, the calculator multiplies current by line voltage and the square-root-of-three factor. The result panel then shows the same apparent power in kilovolt-amps as a supporting cross-check.

The exact working equation is displayed beside the result so you can verify the arithmetic and confirm that the selected phase mode matches the supply you are evaluating.

VA = A x V

Use for single-phase AC when current and voltage are known.

VA = √3 x A x V

Use for balanced three-phase AC when line current and line voltage are known.

kVA = VA / 1,000

Shows the same apparent power at the kilovolt-amp scale.

How to interpret the VA result

The VA result is the apparent power implied by the entered current, voltage, and phase assumptions. That makes it useful for small-equipment comparisons, control-panel checks, and translating a line current into the apparent-power label often used on compact devices.

Because the headline stays in VA, the page keeps the promised output unit explicit instead of auto-scaling to another apparent-power label. The supporting kVA value remains visible for easier comparison with larger equipment ratings.

What this simplified conversion does not replace

This calculator does not model real power, power factor, harmonics, conductor sizing, or protection selection. It is a clean apparent-power conversion based on the selected phase relationship.

Use it as an educational and planning tool. For installation, procurement, or compliance decisions, verify the result against the actual system design, manufacturer documentation, and the applicable electrical standard.

Frequently asked questions

Why does three-phase mode use the square-root-of-three factor?

Because balanced three-phase apparent power is based on line current and line voltage, which introduces the √3 factor when converting between current and apparent power.

 Why do I need voltage if I already know the current?

Because apparent power depends on both current and voltage. The same current produces different VA values at different supply voltages.

 Can I use this to size wiring or breakers directly?

No. It converts current into apparent power only. Final conductor and protection sizing still require separate code-based and equipment-specific checks.

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Convert real watts into apparent power in kilovolt-amps using the entered power factor, with supporting volt-amps and the exact kVA = W / (PF × 1,000) working equation.

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