1 HP to Amps conversions with solved examples. In this post, you’ll learn to convert 1 horsepower to ampere for different voltage, efficiency, and power factors.
List of Contents
1 HP motor Amps calculations in case of 12 volts
Assumed Values:
- Voltage = 12 V
- %Efficiency = 0.9
- Power Factor (PF) = 0.91
| HP | Amps |
|---|---|
| 1 HP to Amps for DC Circuit | 69.07407 |
| 1 HP Single Phase AC Circuit | 75.90558 |
| 1 HP to Amps in Two Phase Four Circuit AC Circuit | 37.95279 |
| 1 HP tp Amps Three Phase AC Circuit | 43.87606 |
Calculations:
1 HP to Amps for 12 V DC Circuit
Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲)
Amps = (1 𝐱 𝟕𝟒𝟔)/(12 x 0.9) = 69.07407407 Amps
1 HP Single Phase for 12 V AC Circuit
Amps = (HP x 746)/(E x %Efficiency x PF)
Amps = (1 𝐱 𝟕𝟒𝟔)/(12 x 0.9 x 0.91) = 75.90557591 Amps
1 HP to Amps for 12 V Two-Phase Four wire Circuit
Amps = (HP x 746)/(E x %Efficiency x PF x 2)
Amps = (1 𝐱 𝟕𝟒𝟔)/(12 x 0.9 x 0.91 x 2) = 37.95279 Amps
1 HP to Amps for 12 V Three Phase AC Circuit
Amps = (HP x 746)/(E x %Efficiency x PF x 1.73)
Amps = (1 𝐱 𝟕𝟒𝟔)/(12 x 0.9 x 0.91 x 1.73) = 43.87606 Amps
1 HP motor Amps calculations in case of 120 volts
Assumed Values:
- Voltage = 120 V
- %Efficiency = 0.9
- Power Factor (PF) = 0.91
| 1 HP @ 120 V | Formula | Solution | Amps |
|---|---|---|---|
| 1 HP to Amps for 120 V DC Motor | Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲) | Amps = (1 𝐱 𝟕𝟒𝟔)/(120 x 0.9) | 6.907407 |
| 1 HP to Amps for 120 V Single Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF) | Amps = (1 𝐱 𝟕𝟒𝟔)/(120 x 0.9 x 0.91) | 7.590558 |
| 1 HP to Amps for 120 V Two phase 4 wire AC circuit | Amps=(HP x 746)/(E x %Efficiency x PF x 2) | Amps = (1 𝐱 𝟕𝟒𝟔)/(120 x 0.9 x 0.91 x 2) | 3.795279 |
| 1 HP to Amps for 120 V 3 Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 1.73) | Amps = (1 𝐱 𝟕𝟒𝟔)/(120 x 0.9 x 0.91 x 1.73) | 4.387606 |