kVA to Amps Calculator

Kilovolt-amperes to amperage converter for transformers, generators, and electrical equipment. Calculate full load current for single-phase and three-phase systems.

kVA to Amps Calculator

Convert kilovolt-amperes to current for transformers, generators, and electrical equipment

Input Parameters

kVA

Kilovolt-amperes rating

Formula Used
I = S ÷ (V × √3)
P = S × PF (real power)
Q = S × sin(cos⁻¹(PF)) (reactive power)
Where: I = Current (A), S = Apparent Power (VA), V = Voltage (V), PF = Power Factor

Calculation Results

Load Current
60.14
Amps
@ 480 V Three-Phase
Power Triangle
Apparent Power (S):50 kVA
Real Power (P):42.5 kW
Reactive Power (Q):26.3 kVAR
Power Factor:0.85
Current at Different Voltages
VoltageCurrent
208 V138.8 A
240 V120.3 A
480 V60.1 A

Common kVA to Amps Conversions

Single-Phase @ 240 V

kVA RatingFull Load Amps
10 kVA41.7 A
15 kVA62.5 A
25 kVA104.2 A
37.5 kVA156.3 A
50 kVA208.3 A
75 kVA312.5 A
100 kVA416.7 A
167 kVA695.8 A

Three-Phase @ 480 V

kVA RatingFull Load Amps
30 kVA36.1 A
45 kVA54.1 A
75 kVA90.2 A
112.5 kVA135.3 A
150 kVA180.4 A
225 kVA270.6 A
300 kVA360.8 A
500 kVA601.4 A
750 kVA902.1 A
1000 kVA1202.8 A
1500 kVA1804.2 A
2000 kVA2405.6 A

Real-World kVA to Amps Examples

Office Building Transformer

Scenario: 750 kVA transformer for commercial building

Voltage: 480 V, 3-phase

Calculation:

I = 750 × 1000 / (480 × 1.732)
I = 750,000 / 831.36
I = 902.1 Amps

Result: 902.1 A full load current

Hospital Emergency Generator

Scenario: 2000 kVA standby generator

Voltage: 480 V, 3-phase

Power Factor: 0.8 lagging

Calculation:

I = 2000 × 1000 / (480 × 1.732)
I = 2,000,000 / 831.36
I = 2405.6 Amps

Result: 2405.6 A rated current

Real Power: 1600 kW @ 0.8 PF

Solar Farm Central Inverter

Scenario: 1500 kVA solar inverter

AC Output: 480 V, 3-phase

Power Factor: 0.95 leading

AC Current:

I = 1500 × 1000 / (480 × 1.732)
I = 1,500,000 / 831.36
I = 1804.2 Amps

AC Output: 1804.2 A

Real Power: 1425 kW @ 0.95 PF

Power Factor Impact on kVA

Understanding Power Triangle

The relationship between kVA (apparent power), kW (real power), and kVAR (reactive power) forms the power triangle:

  • ▶kVA² = kW² + kVAR² (Pythagorean theorem)
  • ▶Power Factor = kW / kVA = cos(θ)
  • ▶kVAR = kVA × sin(θ)

Related Electrical Calculators

kW to Amps

Convert kilowatts to amperage

Watts to Amps

Power to current converter

Three Phase

3-phase power calculations

Wire Size

Calculate required wire gauge

Professional Installation Required

kVA calculations are critical for proper equipment sizing and electrical safety. Transformers and generators must be installed by licensed electricians following local codes. Improper sizing can lead to equipment damage, fire hazards, and code violations. Always consult with qualified professionals and verify calculations with manufacturer specifications.