1/2 HP to Amps
A 1/2 HP motor draws approximately 4.3 amps at 120V (assuming 85% efficiency, 0.85 power factor). The exact amperage depends on voltage, motor efficiency, and power factor.
1/2 HP Motor Amps at Every Voltage
Efficiency: 85%, Power Factor: 0.85
| Voltage | Estimated Amps |
|---|---|
| 120V (US residential) | 4.3 A |
| 208V (US commercial three-phase) | 2.48 A |
| 220V (Legacy international / parts of Asia) | 2.35 A |
| 230V (UK / EU residential) | 2.24 A |
| 240V (US residential (dryer, range, HVAC)) | 2.15 A |
| 400V (UK / EU commercial three-phase) | 1.29 A |
| 480V (US industrial three-phase) | 1.08 A |
Also Calculate
Other HP Values
1/8 HP1.08A at 120V
1/6 HP1.43A at 120V
1/4 HP2.15A at 120V
1/3 HP2.87A at 120V
3/4 HP6.45A at 120V
1 HP8.6A at 120V
1.5 HP12.91A at 120V
2 HP17.21A at 120V
3 HP25.81A at 120V
5 HP43.02A at 120V
7.5 HP64.53A at 120V
10 HP86.04A at 120V
15 HP129.07A at 120V
20 HP172.09A at 120V
25 HP215.11A at 120V
30 HP258.13A at 120V
40 HP344.18A at 120V
50 HP430.22A at 120V
75 HP645.33A at 120V
This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.