kW to Amps

Converting kilowatts to amps is one of the most common calculations in electrical work. Whether you’re sizing a circuit breaker, choosing wire gauge, or evaluating a generator’s output, you need to know how many amps a given power load draws.

The challenge is that kilowatts (kW) measure power — the rate of energy use — while amps measure current, the actual flow of electricity through a wire. These two units aren’t directly interchangeable. To move from kW to amp, you need one more variable: voltage (and for AC circuits, sometimes power factor and phase configuration too).

This guide gives you the exact formulas, a step-by-step method, ready-to-use conversion tables, and real-world examples so you can go from kilowatts to amps correctly every time — whether you’re working with single phase, three phase, or a specific voltage like 220V, 240V, or 400V.

Safety note: The calculations on this page are for planning and estimation purposes. Always have circuit breakers, wiring, and electrical installations sized. This calculator is verified by a licensed electrical engineer with local electrical code (e.g., NEC, IEC, or equivalent).