Conversions

Amps to Kilowatts Calculator

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

Your details

A
V

Common: 120 V (US), 230 V (EU/UK).

1 for DC/resistive; ~0.8 for motors.

Results

Power
—

Last updated June 30, 2026. Results update automatically as you type.

How it works

Kilowatts = amps × volts × power factor ÷ 1000. For DC or resistive loads the power factor is 1.

Frequently asked questions

How many kW is 20 amps?

At 230 V and power factor 1, that is 4.6 kW. At 120 V it is 2.4 kW. Voltage matters, so enter yours.

When is power factor not 1?

For inductive loads like motors and compressors, often around 0.8. DC and resistive heating are 1.

Why convert amps to kW?

To size circuits, generators and supplies, and to compare against appliance power ratings given in kW.

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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