What formula converts kVA to volts for single-phase circuits?

For single-phase AC: V(V) = S(kVA) × 1000 / I(A). Multiply the kVA by 1000 to get volt-amperes, then divide by the current in amperes. The result is the line-to-neutral voltage.

What formula converts kVA to volts for three-phase circuits?

For three-phase AC: V(V) = S(kVA) × 1000 / (I(A) × √3). The √3 factor (approximately 1.7321) accounts for the three-phase relationship. The result is the line-to-line voltage.

kVA (kilovolt-ampere) is the unit of apparent power in an AC circuit. It represents the total power supplied by the source, combining real power (kW) and reactive power (kVAR). Generators, transformers, and UPS systems are commonly rated in kVA.

How does kVA relate to kW and power factor?

kW = kVA × power factor (PF). For purely resistive loads, PF = 1 and kW equals kVA. For inductive loads such as motors, PF is typically 0.8–0.95, so kW is less than kVA. This calculator finds voltage from kVA, independent of power factor.

Is the result line-to-neutral or line-to-line voltage?

For single-phase calculations the result is the line-to-neutral voltage. For three-phase calculations it is the line-to-line (phase-to-phase) voltage measured between any two of the three hot conductors.

Does this apply to DC circuits?

kVA is an AC concept only and does not apply to DC circuits. For DC, use P(W) = I(A) × V(V) and rearrange to V = P / I.

kVA to Volts Calculator

Name: kVA to Volts Calculator
Availability: InStock
Author: Nham Vu

Convert kilovolt-amperes (kVA) to volts (V) for single-phase or three-phase AC circuits instantly.

Circuit Parameters

Circuit Type

Apparent Power (kVA)

Current (A)

Result

Enter values and press Calculate

Formula Reference

Single-Phase AC

V = kVA × 1000 / I

Result is line-to-neutral voltage

Three-Phase AC

V = kVA × 1000 / (I × √3)

Result is line-to-line voltage

Result copied!

Summary

Convert kilovolt-amperes (kVA) to volts (V) for single-phase or three-phase AC circuits instantly.

How it works

Select your circuit type: single-phase AC or three-phase AC.
Enter the apparent power in kilovolt-amperes (kVA).
Enter the current in amperes (A).
The calculator applies the correct formula and displays the result in volts.
A breakdown table shows input values, formula used, and the computed result.
Use the Reset button to start a new calculation.

Use cases

Determine the output voltage of a generator given its kVA rating and load current.
Verify the operating voltage of a transformer from its kVA and full-load ampere ratings.
Calculate the required system voltage when designing electrical distribution panels.
Convert UPS or inverter kVA ratings to expected output voltage.
Size capacitor banks and power factor correction equipment by knowing system voltage.
Validate nameplate voltage of electrical equipment against kVA and current ratings.
Support electrical engineering calculations for industrial and commercial facilities.
Cross-check three-phase motor voltage from kVA rating and line current measurements.

Frequently Asked Questions

Related tools

Kva To Amps Amps To Volts Kilowatts To Volts

Last updated: 2026-05-23 · Reviewed by Nham Vu