Enter Values
Formulas
DC: A = kW × 1000 ÷ V
Single-phase: A = kW × 1000 ÷ (V × PF)
Three-phase: A = kW × 1000 ÷ (√3 × V × PF)
For three-phase systems, voltage means line-to-line voltage.
Example
A 10 kW single-phase load at 240 V and 0.9 PF draws approximately 46.3 A.
Real Power and Current
Power factor is required for AC loads because current carries both real and reactive components. At the same kW and voltage, lower power factor produces higher current.
For DC, power factor does not apply and the calculator uses kW divided directly by voltage.
Limitations
This result is steady-state current at the entered operating point. It does not include efficiency unless the entered kW already represents electrical input power.
Do not use calculated current alone for conductor, breaker, motor, generator, or equipment sizing.