Amps to Kilowatts Converter
Convert electrical current in amps (A) to real power in kilowatts (kW). Knowing voltage is required to determine the power drawn by the circuit.
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Ampere ↔ Kilowatt
A
kW
Calculation Formula
(1,000 A × 120 V × 1 PF) ÷ 1000 = 120 kW
Worked Example
Convert 40 amps to kilowatts at 240V (Single-Phase, PF=1):
(40 A × 240 V × 1.0) ÷ 1,000 = 9.6 kW
Ampere to Kilowatt Table
| A | kW (at 120V) | kW (at 230V) |
|---|---|---|
| 10 A | 1.2 kW | 2.3 kW |
| 20 A | 2.4 kW | 4.6 kW |
| 30 A | 3.6 kW | 6.9 kW |
| 40 A | 4.8 kW | 9.2 kW |
| 50 A | 6 kW | 11.5 kW |
| 100 A | 12 kW | 23 kW |
| 200 A | 24 kW | 46 kW |
Understanding the Conversion
Converting from amps to kilowatts is commonly used to find the total power capacity of an electrical panel or a heavy-duty circuit (like an EV charger or central AC).
Size your backup power system.
Use these converted ratings to determine exactly what size generator or battery bank you need.