Amps to Kilowatts Calculator

To convert amperes to watts for both DC and AC single and three-phase circuits, you will need to input the current and voltage values. Our calculator will then provide you with the precise wattage output.

Input

Current Type: DC AC - Single phase AC - Three phase
Current (Amps):

Voltage Type: Line to Line Voltage Line to Neutral Voltage

Voltage (Volts):

Power factor (≤1):

Calculate Reset

Output:

Power (kW):

Power (W):

Power (mW):

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Calculating Kilowatts from DC Amperes

P_(kW) = I_(A) × V_(V) / 1000, where

P_(kW) – electrical power in kilowatts (kW);

I_(A) – electric current in amperes (A);

V_(V) – voltage in volts (V).

AC single Phase Amps to Kilowatts Calculation

P_(kW) = PF × I_(A) × V_(V) / 1000, where

P_(kW) – electrical power in kilowatts (kW);

PF – power factor;

V_(V) – RMS voltage in volts (V);

I_(A) – phase electric current I in amps (A).

Calculating Kilowatts from Three-Phase AC Amperes

Calculation with Line to Line Voltage

P_(kW) = √3 × PF × I_(A) × V_{L-L (V)} / 1000, where

P_(kW) – electrical power in kilowatts (kW);

PF – power factor;

I_(A) – phase electric current I in amperes (A);

V_{L-L (V)} – line to line RMS voltage in volts (V).

Calculation with Line to Neutral Voltage

P_(kW) = 3 × PF × I_(A)× V_L-N (V) / 1000, where

P_(kW) – electrical power in kilowatts (kW);

PF – power factor;

I_(A) – phase electric current I in amps (A);

V_L-N (V) – line to neutral RMS voltage volts (V).

Typical Power Factor Values

Here are typical power factor values in table:

Device/Load	Power Factor
Incandescent lamps	1.0
Resistive loads	1.0
Synchronous motors	0.8-0.95
Induction motors (small)	0.7-0.8
Induction motors (large)	0.85-0.95
Transformers	0.8-0.95
Fluorescent lighting (magnetic ballast)	0.7-0.9
Fluorescent lighting (electronic ballast)	0.9-0.99
Computers and electronics	0.6-0.8

Equivalent Amps and Kilowatts at 120V AC

Equivalent ampere and kilowatt values at 120 volts. Power factor equals 1.

Current (Amps)	Equivalent Kilowatts (kW)
1	0.12
2	0.24
3	0.36
4	0.48
5	0.6
6	0.72
7	0.84
8	0.96
9	1.08
10	1.2
15	1.8
20	2.4
25	3.0
30	3.6
40	4.8
50	6.0
60	7.2
70	8.4
80	9.6
90	10.8
100	12.0

Equivalent Amps and Kilowatts at 240V AC

Equivalent ampere and kilowatt values at 240 volts. Power factor equals 1.

Current (Amps)	Equivalent Kilowatts (kW)
1	0.24
2	0.48
3	0.72
4	0.96
5	1.2
6	1.44
7	1.68
8	1.92
9	2.16
10	2.4
15	3.6
20	4.8
25	6.0
30	7.2
40	9.6
50	12.0
60	14.4
70	16.8
80	19.2
90	21.6
100	24.0

See Also