How do I convert kW to kVA?

kVA = kW / power factor. For example, a 10 kW motor with 0.85 power factor needs 10 / 0.85 = 11.76 kVA of apparent power from the utility.

kVA Calculator

Convert between kVA, amps, and kW for single-phase and three-phase electrical systems. Includes power factor adjustment.

Conversion Mode

Phase

kVA Apparent power

Voltage (V) Line voltage

Current (Amps) Load current

kW Real power

Power Factor 0.1 – 1.0

Result

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Select a mode and enter values to calculate.

Frequently Asked Questions

How do I convert kVA to amps?

Single-phase: Amps = kVA × 1,000 / Voltage. Three-phase: Amps = kVA × 1,000 / (Voltage × √3). Example: 10 kVA at 240V single-phase = 41.67 amps.

What is the difference between kVA and kW?

kVA (kilovolt-amperes) is apparent power — the total power drawn from the source. kW (kilowatts) is real power — the power that actually does work. The relationship: kW = kVA × power factor. For purely resistive loads (PF=1), they are equal.

What is power factor?

Power factor (PF) is the ratio of real power (kW) to apparent power (kVA), ranging from 0 to 1. Resistive loads (heaters, incandescent bulbs) = 1.0. Motors typically 0.8–0.9. Power factor correctors can improve PF closer to 1.0.

kVA Formulas

Conversion	Single-Phase	Three-Phase
kVA to Amps	A = kVA × 1000 / V	A = kVA × 1000 / (V × √3)
Amps to kVA	kVA = V × A / 1000	kVA = V × A × √3 / 1000
kVA to kW	kW = kVA × PF
kW to kVA	kVA = kW / PF

Related Calculators

Single-phase: kVA = V × A / 1,000. Three-phase: kVA = V × A × √3 / 1,000. kW = kVA × PF.