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Amps to kW Calculator

Convert amperes (A) to kilowatts (kW) instantly and accurately using voltage and power factor

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How to Convert Amps to kW

Converting amperes (A) to kilowatts (kW) is a fundamental calculation in electrical engineering and power systems. Amperes represent electrical current, while kilowatts represent real power (active power). The conversion requires knowledge of both voltage (V) and power factor (PF). Our free Amps to kW conversion calculator makes this process quick and easy, providing instant and accurate results for your electrical calculations.

The conversion formula is: kW = (A × V × PF) / 1000, where A is the current in amperes, V is the voltage in volts, PF is the power factor (a value between 0 and 1), and kW is the power in kilowatts. The power factor indicates how efficiently electrical power is being used. A power factor of 1.0 (or 100%) means all the power is being used effectively, while lower values indicate that some power is being wasted as reactive power.

This conversion is commonly used in various applications: sizing circuit breakers and fuses, calculating power consumption of electrical devices, designing electrical circuits and wiring, determining generator and transformer requirements, understanding electrical load characteristics, and working with residential, commercial, and industrial electrical systems. Knowing how to convert Amps to kW helps you make informed decisions about electrical system design, equipment selection, and energy management.

Our calculator takes the amperes, voltage, and power factor as inputs, automatically applies the conversion formula, and provides the result in kilowatts. The calculator handles both single-phase and three-phase calculations (for three-phase, use line-to-line voltage). Whether you're working with motors, heaters, lighting systems, or any electrical equipment, our Amps to kW calculator provides accurate, instant conversions.

Example:

If you have a device drawing 20 amperes at 230 volts with a power factor of 0.8, the power in kW would be: kW = (20 A × 230 V × 0.8) / 1000 = 3680 / 1000 = 3.68 kW. For a device drawing 15 amperes at 120 volts with a power factor of 0.9: kW = (15 A × 120 V × 0.9) / 1000 = 1620 / 1000 = 1.62 kW.

Frequently Asked Questions

The formula to convert amperes (A) to kilowatts (kW) is: kW = (A × V × PF) / 1000, where A is the current in amperes, V is the voltage in volts, PF is the power factor (a value between 0 and 1), and kW is the power in kilowatts.
Yes, voltage is required for the conversion. The power (kW) depends on both current (amps) and voltage. Common voltages include 120V, 230V, 240V, 380V, and 400V depending on your location and application.
Power factor (PF) is the ratio of real power (watts/kW) to apparent power (VA/kVA). It indicates how efficiently electrical power is being used. A power factor of 1.0 (or 100%) means all the power is being used effectively, while lower values indicate that some power is being wasted as reactive power. Most electrical systems have a power factor between 0.85 and 0.95.
Yes, you can use this calculator for three-phase systems. For three-phase calculations, use the line-to-line voltage (not phase voltage). For example, for a 400V three-phase system, use 400V in the calculator.
Yes, our Amps to kW calculator is completely free to use. No registration or payment is required. Simply enter your values (amps, voltage, and power factor) and get instant, accurate results.