Conversions

Kilowatts to Amps Calculator

By HowMuchWatts Editorial Team Reviewed June 30, 2026 Formula and source method

This calculator converts power in kilowatts into the current it draws in amps, using your voltage and power factor.

Change any number below — your result updates instantly, no button to click.

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Written & maintained by the HowMuchWatts team · Last updated June 30, 2026 · How we verify our numbers

How it works

Amps = kilowatts × 1000 ÷ (volts × power factor). Use this to check whether a circuit or breaker can handle a given load.

Frequently asked questions

How many amps does 3 kW draw?

At 230 V and power factor 1, about 13 amps. At 120 V, about 25 amps. Lower voltage means more current for the same power.

Why does this matter for breakers?

Cables and breakers are rated in amps. Knowing the current lets you confirm a device will not overload the circuit.

Single vs three phase?

This calculator assumes single phase. Three-phase current is lower for the same power (divided by roughly 1.73 × voltage).

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

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