Kilowatts
Converts single-phase real power to kW.
Enter current, voltage, and power factor to estimate single-phase real power in kW.
For a single-phase estimate, kW = amps x voltage x power factor / 1,000.
Converts single-phase real power to kW.
Shows amps times volts times power factor.
Shows amps times volts in VA.
Multiply amps by voltage and power factor, then divide by 1,000 to calculate kilowatts. A 10 A load at 240 V and power factor 0.8 gives 1.92 kW. The same current at power factor 1 would represent 2.4 kW.
Power factor separates real power from apparent power. The product of amps and volts is VA; multiplying by power factor produces watts. That distinction is important for AC equipment such as motors, transformers, and power-electronic loads.
This calculator uses a single-phase formula only. It does not account for three-phase configurations, inrush, harmonic current, conductor ampacity, protection, or local electrical requirements. Use manufacturer documentation and a qualified electrician for a real circuit or equipment decision.
| Input | What it means | Planning note |
|---|---|---|
| Amps | Current for the selected load | Use measured or documented current. |
| Voltage | Single-phase supply voltage | Match the actual load connection. |
| Power factor | Real-power ratio | Use a known or specified load value. |
| kW | Estimated real power | Do not treat it as a wiring rating. |
Translate a current rating into estimated kW.
Estimate real-power demand from current assumptions.
Compare apparent and real power at different power factors.
At power factor 1, it is 2.4 kW. At power factor 0.8, it is 1.92 kW.
For the same amps and volts, less of the apparent power is converted into real power.
No. It is a single-phase formula; three-phase systems require a different calculation.
No. Breaker and conductor design must consider the equipment and applicable electrical requirements.
Last reviewed: October 4, 2026. Electrical estimates are educational planning tools, not installation instructions. A qualified electrician must verify conductor, protection, voltage drop, grounding, equipment, and local code requirements.
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