Amps to Kilowatts (kW) Electrical Conversion Calculator
Enter the current and voltage to convert amps to watts for DC and AC single and three-phase circuits.
How to Convert Amps to Kilowatts
To convert amps to kilowatts the power formula can be used, which states that I = P ÷ E, given that P is the power in watts, I is current in amps, and E is voltage in volts.
The amps to kilowatts formula derived from the power formula is:
P(kW) = I(A) × V(V)1,000
Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts, divided by 1,000.
For example, let’s find the kilowatts of power for a circuit with 12 amps of current at 120 volts
power = current × voltage ÷ 1,000
power = 12A × 120V ÷ 1,000
power = 1,440 ÷ 1,000
power = 1.44 kW
Single-Phase AC Circuit Amps to Kilowatts Conversion
Conversion of amps to kilowatts for single-phase AC circuits using the power factor can be done with a slightly different formula.
P(kW) = I(A) × V(V) × PF1,000
Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF, divided by 1,000. Try our power factor calculator to get the power factor if needed.
Three-Phase AC Circuit Amps to Kilowatts Conversion
Using Line to Line Voltage
The formula to convert amps to kilowatts for three-phase AC circuits where the line to line voltage is known is:
P(kW) = I(A) × V(V) × PF × √31,000
Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF multiplied by the square root of 3, divided by 1,000.
Using Line to Neutral Voltage
The formula to convert amps to kilowatts for three-phase AC circuits where the line to neutral voltage is known is:
P(kW) = I(A) × V(V) × PF × 31,000
Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF multiplied by 3, divided by 1,000.
How to Convert Amps and Ohms to Kilowatts
It’s also possible to convert amps to kilowatts using circuit resistance with this formula:
P(kW) = I(A)2 × R(Ω)1,000
Thus, the power P in kilowatts is equal to the current I in amps squared multiplied by the resistance R in ohms, divided by 1,000.
You might also be interested in our amps to watts calculator.
Equivalent Amps and Kilowatts at 120V AC
| Current | Power | Voltage |
|---|---|---|
| 1 Amps | 0.12 Kilowatts | 120 Volts |
| 2 Amps | 0.24 Kilowatts | 120 Volts |
| 3 Amps | 0.36 Kilowatts | 120 Volts |
| 4 Amps | 0.48 Kilowatts | 120 Volts |
| 5 Amps | 0.6 Kilowatts | 120 Volts |
| 6 Amps | 0.72 Kilowatts | 120 Volts |
| 7 Amps | .084 Kilowatts | 120 Volts |
| 8 Amps | 0.90 Kilowatts | 120 Volts |
| 9 Amps | 1.08 Kilowatts | 120 Volts |
| 10 Amps | 1.2 Kilowatts | 120 Volts |
| 11 Amps | 1.32 Kilowatts | 120 Volts |
| 12 Amps | 1.44 Kilowatts | 120 Volts |
| 13 Amps | 1.56 Kilowatts | 120 Volts |
| 14 Amps | 1.68 Kilowatts | 120 Volts |
| 15 Amps | 1.8 Kilowatts | 120 Volts |
| 20 Amps | 2.4 Kilowatts | 120 Volts |
| 25 Amps | 3 Kilowatts | 120 Volts |
| 30 Amps | 3.6 Kilowatts | 120 Volts |
| 35 Amps | 4.2 Kilowatts | 120 Volts |
| 40 Amps | 4.8 Kilowatts | 120 Volts |
| 45 Amps | 5.4 Kilowatts | 120 Volts |
| 50 Amps | 6 Kilowatts | 120 Volts |
| 60 Amps | 7.2 Kilowatts | 120 Volts |
| 70 Amps | 8.4 Kilowatts | 120 Volts |
| 80 Amps | 9.6 Kilowatts | 120 Volts |
| 90 Amps | 10.8 Kilowatts | 120 Volts |
| 100 Amps | 12 Kilowatts | 120 Volts |
Equivalent Amps and Kilowatts at 240V AC
| Current | Power | Voltage |
|---|---|---|
| 1 Amps | 0.24 Kilowatts | 240 Volts |
| 2 Amps | 0.48 Kilowatts | 240 Volts |
| 3 Amps | 0.72 Kilowatts | 240 Volts |
| 4 Amps | 0.96 Kilowatts | 240 Volts |
| 5 Amps | 1.2 Kilowatts | 240 Volts |
| 6 Amps | 1.44 Kilowatts | 240 Volts |
| 7 Amps | 1.68 Kilowatts | 240 Volts |
| 8 Amps | 1.92 Kilowatts | 240 Volts |
| 9 Amps | 2.16 Kilowatts | 240 Volts |
| 10 Amps | 2.4 Kilowatts | 240 Volts |
| 11 Amps | 2.64 Kilowatts | 240 Volts |
| 12 Amps | 2.88 Kilowatts | 240 Volts |
| 13 Amps | 3.12 Kilowatts | 240 Volts |
| 14 Amps | 3.36 Kilowatts | 240 Volts |
| 15 Amps | 3.6 Kilowatts | 240 Volts |
| 20 Amps | 4.8 Kilowatts | 240 Volts |
| 25 Amps | 6 Kilowatts | 240 Volts |
| 30 Amps | 7.2 Kilowatts | 240 Volts |
| 35 Amps | 8.4 Kilowatts | 240 Volts |
| 40 Amps | 9.6 Kilowatts | 240 Volts |
| 45 Amps | 10.8 Kilowatts | 240 Volts |
| 50 Amps | 12 Kilowatts | 240 Volts |
| 60 Amps | 14.4 Kilowatts | 240 Volts |
| 70 Amps | 16.8 Kilowatts | 240 Volts |
| 80 Amps | 19.2 Kilowatts | 240 Volts |
| 90 Amps | 21.6 Kilowatts | 240 Volts |
| 100 Amps | 24 Kilowatts | 240 Volts |
