Amps to kW Calculator
Easily convert current (amps) to power (kilowatts) for single-phase and three-phase circuits
Calculation Result
Power (kW)
Power (Watts)
Formula Used:
Calculation Formulas
Single Phase
kW = (I × V × PF) / 1000
Three Phase
kW = (I × V × PF × √3) / 1000
Where: I = Current (Amps), V = Voltage (Volts), PF = Power Factor
Common Examples
Example 1: 220V Single Phase, 10A Current, 0.85 PF
Power = (10 × 220 × 0.85) / 1000 = 1.87 kW
Example 2: 380V Three Phase, 15A Current, 0.9 PF
Power = (15 × 380 × 0.9 × 1.732) / 1000 = 8.85 kW
Frequently Asked Questions (FAQ)
Power factor is the ratio of real power to apparent power in an AC circuit, ranging between 0 and 1. Resistive loads (like incandescent bulbs) have a power factor close to 1, while inductive loads (like motors) have a lower power factor, typically between 0.7 and 0.9.
Single-phase circuits are commonly used for residential and small commercial applications, typically operating at 220V or 110V. Three-phase circuits are used for industrial equipment and large electrical loads, usually at 380V or 480V, offering higher power capacity and efficiency.
Select based on your electrical system: 220V (single-phase) for most residential applications in China, 380V (three-phase) for industrial use. In North America, common voltages are 120V/240V, in Europe 230V, and in Japan 100V.
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