# Amps to kW free online calculator

Amps (A) to kilowatts (kW) calculator.

kW
W
mW

kW to amps calculator »

* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12

## 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 factor PF 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.

DeviceTypical power factor
Fluorescent lamp0.95
Incandescent lamp1
Resistive oven1
Synchronous motor0.9

## Ampere definition

Ampere or amp (symbol: A) is the unit of electrical current.

The Ampere unit is named after Andre-Marie Ampere, from France.

One Ampere is defined as the current that flows with electric charge of one Coulomb per second.

1 A = 1 C/s

## Watt definition

Watt is the unit of power (symbol: W).

The watt unit is named after James Watt, the inventor of the steam engine.

One watt is defined as the energy consumption rate of one joule per second.

1W = 1J / 1s

One watt is also defined as the current flow of one ampere with voltage of one volt.

1W = 1V × 1A

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