Amps to Kilowatts Calculator
Calculate the equivalent kilowatt (kW) value for any given amperage (A).
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Results
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 the 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
| 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 |
Comprehensive Guide: Amps to Kilowatts Conversion
Understanding how much power your devices consume is essential for managing energy costs and ensuring electrical safety. The Amps to Kilowatts Calculator allows you to quickly convert electrical current (in amperes) into power (in kilowatts) for any standard DC, single-phase AC, or three-phase AC system.
What Are Amps and Kilowatts?
Amperage (Amps or A) measures the volume of electrons flowing through an electrical conductor per second. It is the measure of electrical current. Kilowatts (kW) measure the actual power being consumed by the device at any given moment. One kilowatt equals 1,000 watts. To convert the "flow" of electricity into "total power," you must multiply the current by the voltage (the electrical pressure).
How the Calculator Computes Power
Depending on the type of electrical circuit, the formula for calculating power changes slightly. Our tool automatically adjusts for these variables:
- DC Circuits: Power is simply voltage multiplied by current. To get kilowatts, the result is divided by 1,000. P = (I × V) / 1000
- AC Single-Phase Circuits: Because AC current alternates, devices like motors and transformers introduce inefficiencies. The Power Factor (PF) accounts for this inefficiency. P = (PF × I × V) / 1000
- AC Three-Phase Circuits: Three-phase power is more complex and highly efficient, used primarily in commercial settings. The calculator uses a multiplier of √3 (approx 1.732) for line-to-line voltage calculations.
Real-World Usage
This calculator is particularly helpful for determining the power rating of an appliance based on its breaker size or nameplate current. By knowing the kilowatts, you can estimate energy consumption in kilowatt-hours (kWh), helping you accurately predict your electricity bill and manage energy efficiency.