3-Phase Motor Amperage Calculator
I = P / (√3 · V · PF · η)
Typical 0.8–0.9
0–1 (e.g., 0.9)
How to Use This Calculator
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.
Frequently Asked 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.