Estimated current
Converts kW to watts and divides by voltage and power factor.
Enter real power in kW, circuit voltage, and power factor to estimate single-phase current.
For a single-phase estimate, amps = kW x 1,000 / (voltage x power factor). The tool converts kW to watts before calculating current.
Converts kW to watts and divides by voltage and power factor.
Shows the real-power conversion from kW.
Shows watts divided by power factor in VA.
First convert kilowatts to watts by multiplying by 1,000. Then divide watts by voltage and power factor. For example, 2.4 kW at 240 V and power factor 1 gives an estimated 10 A.
The result changes with voltage and power factor. The same kW load has a lower current at a higher voltage, while a lower power factor increases current for the same real power. Enter values that describe the actual supply and load instead of relying on a generic conversion.
This is a single-phase estimate only. It does not cover three-phase power, motor starting current, conductor ampacity, overcurrent protection, or local electrical code. Use manufacturer information and a qualified electrician for an installation decision.
| Input | What it means | Planning note |
|---|---|---|
| Kilowatts | Real load power in thousands of watts | Use a documented load value. |
| Voltage | Single-phase supply voltage | Confirm the circuit configuration. |
| Power factor | Real-power ratio for AC loads | Use a specified value for inductive equipment. |
| Amps | Estimated line current | Not a wire or breaker selection. |
Compare current draw at 120 V and 240 V.
Translate a stated kW value into a current estimate.
Show how power factor affects AC current.
At power factor 1 in a single-phase scenario, it is 10 A.
The standard power relationship uses watts, so kW is multiplied by 1,000.
No. Use a three-phase formula and manufacturer information for three-phase equipment.
Use the documented load value. Use 1 only when that is appropriate for the load or scenario.
Last reviewed: October 4, 2026. Electrical estimates use the entered values and are not a wiring design, code-compliance determination, or substitute for a qualified electrician.
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