HP to Amps Conversion Formula with Calculation Examples
HP to Amps or Horsepower to amperes conversion formula can be used to determine the amperage of circuits from the known values of horsepower alongside with volts, percentage efficiency, and power factor (In AC Circuits)
Contents
HP to Amps Conversion Formulae Video
HP to Amps in DC Circuits
Formula: Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲)
HP to Amps in Single Phase AC Circuits
Formula: Amps=(HP x 746)/(E x %Efficiency x PF)
HP to Amps in Three Phase AC Circuits
Formula: Amps=(HP x 746)/(E x %Efficiency x PF x 1.73)
10 hp 3 phase motor amps
The table below illustrates volts for 10 HP motor. Efficiency assumed = 0.85, Power Factor = 0.9
| HP to Amps | 120 V | 220 V | 230 V | 240 V | 480 V | 1100 V | 3300 V |
|---|---|---|---|---|---|---|---|
| 10 HP DC Motor Amps | 73.1372549 | 39.8930481 | 38.1585678 | 36.5686275 | 18.2843137 | 7.97860963 | 2.65953654 |
| 10 HP Single Phase AC motor Amps | 81.2636166 | 44.325609 | 42.3984086 | 40.6318083 | 20.3159041 | 8.86512181 | 2.9550406 |
| 10 HP Three phase AC Motor Amps | 46.9731888 | 25.6217393 | 24.5077507 | 23.4865944 | 11.7432972 | 5.12434786 | 1.70811595 |
| Two-phase Four Wire circuit Amps | 40.6318083 | 22.1628045 | 21.1992043 | 20.3159041 | 10.1579521 | 4.4325609 | 1.4775203 |
HP to Amps in Two Phase Four wire AC Circuits
Formula: Amps=(HP x 746)/(E x %Efficiency x PF x 2)