kW to Amps Calculator
Convert kilowatts to amps — or amps to kW — for DC, single-phase, and three-phase circuits. Set the voltage and power factor, and WattSimple also shows the NEC breaker and copper wire size for the resulting current.
Current
40 A
- Power in
- 9.6 kW
- At voltage
- 240 V
NEC wire & breaker for this load
- Breaker
- 40 A
- Min. copper wire (75°C)
- 8 AWG
Copper, 75°C terminations, NEC Table 310.16. Real installs may need derating for ambient heat, conduit fill, or voltage drop. Full wire & breaker chart. Always confirm with a licensed electrician + local AHJ.
Frequently asked questions
Ask AI about this
Open an AI assistant with a question grounded in this page.
Related tools
Related converters
Watts ↔ Amps
Convert watts to amps (or amps to watts) for DC, single-phase, and three-phase — plus the NEC wire and breaker the result needs.
Open converterVolts ↔ Watts
Convert volts to watts (or watts to volts) using the current — watts = volts × amps — for DC, single-phase, and three-phase, with the NEC wire and breaker.
Open converterWatts ↔ kW
Convert watts to kilowatts and back. 1 kW = 1,000 W. Enter watts or kilowatts to see the other instantly.
Open converterMW ↔ kW
Convert megawatts to kilowatts and watts (or back) — a power-unit conversion. 1 MW = 1,000 kW = 1,000,000 W. For utility, solar, and generator capacity.
Open converterSources & standards
This tool's methodology and data follow US standards and authoritative public datasets: