3-Phase Motor Amperage Calculator
I = P / (√3 · V · PF · η)
Typical 0.8–0.9
0–1 (e.g., 0.9)
Instructions
Enter motor output power in kW, line voltage, power factor, and efficiency. Click Calculate to get the line current per phase.
Formula
I = P / (√3 · V · PF · η)
Where P is output power (W), V is line-to-line voltage (V), PF is power factor, and η is efficiency.
Common Questions
Does this return per-phase current?
Yes, it returns the line current for a balanced three-phase system.
What if I have horsepower instead of kW?
Convert: 1 hp ≈ 0.7457 kW, then use the calculator.