Amps to Kilowatts Calculator
Convert electrical current in amperes (A) to power in kilowatts (kW). Ideal for understanding power consumption and electrical load calculations. Obtain an estimation of kilowatts from amperes using this convenient online tool.
* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12
What is Amps to Kilowatts Calculator
Converting amps (A) to kilowatts (kW) requires knowledge of the voltage at which the electrical device operates. The formula for converting amps to kilowatts is:
Kilowatts (kW) = Amps (A) x Volts (V) / 1000
To use this formula, you need to know the amperage (A) and the voltage (V) at which the device is operating. Divide the result by 1000 to convert from watts to kilowatts.
For example, if you have a device that operates at 10 amps and 120 volts, you can calculate the power consumption in kilowatts as follows:
Kilowatts (kW) = 10 A x 120 V / 1000 Kilowatts (kW) = 1.2 kW
In this example, the device consumes 1.2 kilowatts of power.
Please note that this calculation assumes a direct current (DC) system. If you are working with an alternating current (AC) system, additional factors such as power factor may need to be considered for a more accurate conversion.
DC amps to kilowatts calculation
The power P in kilowatts (kW) is equal to the current I in amps (A), times the voltage V in volts (V) divided by 1000:
P(kW) = I(A) × V(V) / 1000
AC single phase amps to kilowatts calculation
The power P in kilowatts (kW) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V) divided by 1000:
P(kW) = PF × I(A) × V(V) / 1000
AC three phase amps to kilowatts calculation
Calculation with line to line voltage
The power P in kilowatts (kW) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V) divided by 1000:
P(kW) = √3 × PF × I(A) × VL-L (V) / 1000
Calculation with line to neutral voltage
The power P in kilowatts (kW) is equal to 3 times the power factorPF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V) divided by 1000:
P(kW) = 3 × PF × I(A) × VL-N (V) / 1000
Typical power factor values
Do not use typical power factor values for accurate calculations.
| Device | Typical power factor |
|---|---|
| Resistive load | 1 |
| Fluorescent lamp | 0.95 |
| Incandescent lamp | 1 |
| Induction motor full load | 0.85 |
| Induction motor no load | 0.35 |
| Resistive oven | 1 |
| Synchronous motor | 0.9 |
Amps to Kilowatts Calculator Example
To convert Amps (A) to Kilowatts (kW), you need to know the voltage (V) and the power factor (PF) of the electrical system. The formula for this conversion is:
Kilowatts (kW) = Amps (A) × Voltage (V) × Power Factor (PF) / 1000
Here's an example that demonstrates the calculation using a calculator:
Let's assume you have a load with a current draw of 20 Amps (A), a voltage of 220 Volts (V), and a power factor of 0.9:
Kilowatts (kW) = 20 A × 220 V × 0.9 PF / 1000 = 3.96 kW
Therefore, with a current draw of 20 Amps, a voltage of 220 Volts, and a power factor of 0.9, the power consumption would be approximately 3.96 Kilowatts.
Please note that the power factor (PF) represents the efficiency of the electrical system and its values range from 0 to 1. If the power factor is not provided, you can assume a standard value based on the type of load (e.g., residential load typically has a power factor around 0.9). Additionally, this calculation assumes a resistive or non-reactive load. For loads with a reactive component, such as those with inductive or capacitive elements, further considerations and calculations are necessary to determine the true power consumption.
