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 Amps120 V220 V230 V240 V480 V1100 V3300 V
10 HP DC Motor Amps73.137254939.893048138.158567836.568627518.28431377.978609632.65953654
10 HP Single Phase AC motor Amps81.263616644.32560942.398408640.631808320.31590418.865121812.9550406
10 HP Three phase AC Motor Amps46.973188825.621739324.507750723.486594411.74329725.124347861.70811595
Two-phase Four Wire circuit Amps40.631808322.162804521.199204320.315904110.15795214.43256091.4775203

HP to Amps in Two Phase Four wire AC Circuits

Formula: Amps=(HP x 746)/(E x %Efficiency x PF x 2)

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