Quickly calculate three phase motor amperage from kW or horsepower, or convert amps to kW with our free online tool. Essential for electrical engineers and technicians for motor load, wiring, and protection, ensuring optimal electrical system design and safety.
Formula:
To calculate Amperage (I) from Kilowatts (kW):I = (PkW × 1000) / (√3 × V × PF × η)
To calculate Kilowatts (PkW) from Amperage (I):PkW = (√3 × V × I × PF × η) / 1000
- I = Amperage (Amps)
- PkW = Power in Kilowatts (kW)
- V = Line-to-Line Voltage (Volts)
- PF = Power Factor (unitless, e.g., 0.8)
- η = Efficiency (unitless, e.g., 0.85)
- √3 ≈ 1.732 (Square root of 3 for three-phase systems)