HP to Amps Calculator
Convert horsepower to amps — or amps to HP — for motors and pumps. The current a motor draws depends on its voltage, efficiency, and power factor, so set those and WattSimple estimates the amps plus the NEC wire and breaker the circuit calls for.
Current draw
19.18 A
- Horsepower
- 5 HP
- Current at 240 V
- 19.18 A
NEC wire & breaker for this load
- Breaker
- 20 A
- Min. copper wire (75°C)
- 12 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.
An estimate from efficiency and power factor. Real motor circuits are sized from the NEC 430 full-load-current tables on the nameplate — confirm with a licensed electrician.
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This tool's methodology and data follow US standards and authoritative public datasets: