Enter current, voltage, power factor, and phase to calculate the real power (kW) a circuit actually delivers.
How to Use the Amps to Kilowatts (kW) Calculator
Current, voltage, and power factor all feed the result live, and a phase toggle decides which of the two formulas below actually runs.
Single-phase: kW = (V × I × PF) ÷ 1000
Three-phase: kW = (√3 × V × I × PF) ÷ 1000240V and 12A at a 0.9 power factor, single-phase, lands at 2.59 kW. Swap to a 415V three-phase supply with the same 12A and 0.9 power factor and real power climbs to about 7.76 kW — three separate conductors each carrying that current adds up fast.
Power factor is the field worth double-checking before trusting the output. Set it to 1.0 out of convenience and this calculator quietly turns into the Amps to kVA calculator wearing a different name — real and apparent power only match when a load is purely resistive, which almost nothing with a motor or transformer inside actually is. A nameplate, a power-quality meter reading, or a manufacturer's spec sheet is worth the extra minute over guessing.
Once real power is in hand, it's a short step to other units: the kW to Amps calculator runs this exact relationship backward, and the site's Horsepower Calculator converts a kW figure straight into mechanical HP from its Unit Conversion mode.