Amps to Hp – Calculation, formula, chart. How many amps are in 1 HP?

With this calculator you can convert online from Amp to Hp automatically, easily, quickly and free.

For ease we explain how to convert from Amp to Hp in only 1 step, that the formula is used for the calculation and a table with the main conversions of Amp to Hp.

We also show the most common power factors in addition to efficiency values.

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Amps to Hp – Calculation, formula, chart. How many amps are in 1 HP?
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More information of calculator from Amp to Hp:


 Amp to Hp calculation formula, DC, AC, 3 phase, 2 phase, 1 phase:

Formula for convert Amp to HP

  • IDC=Direct current.
  • IAC1Ø=Current/Ampere 1 phase.
  • IAC2Ø=Current/Ampere 2 phase.
  • IAC3Ø=Current/Ampere 3 phase.
  • H.P=Horsepower.
  • VDC=Voltage direct current.
  • VL-N=Voltage line to neutral.
  • VL-L=Voltage line to line.
  • Ef=Efficiency.
  • P.F=Power factor.

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How to convert Amp to Hp AC 3 phases in only 1 step:

amp to hp in only one step

Step 1:

Multiply the AC voltage by the motor efficiency, the power factor, the current and the square root of 3. For example, if the motor is 220 V ac, it has an efficiency of 80%, the power factor is 0.9 and a correinte of 54.4A, you must Multiply 220 V ac by 0.8 (80%) by 0.9 by √3 (square root of 3) and by 54.4A to obtain 274.35 (220Vacx0.8×0.9x√3×54 .4 = 14.925).

Finally divide step 1 between step 2. For example, (220Vacx0.8 x 0.9x√3×54,4)/(746) = 20 Hp.

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Frequently asked questions and answers.

How many amps are in 1 HP?

A three-phase 1hp motor, with an efficiency of 85%, a voltage of 220Vac and a power factor of 0.85, has an amperage of 2.71 Amp.

How many amps does a 1.5 hp motor?

A three-phase 1,5hp motor, with an efficiency of 85%, a voltage of 220Vac and a power factor of 0.85, has an amperage of 4,06 Amp.

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Amp to Hp conversion chart-table:

Amp ACPhasesEfic.Volt.PfHp
1A3P78%208V0,840,31Hp
2A3P78%208V0,840,63Hp
3A3P78%208V0,840,94Hp
4A3P78%208V0,841,26Hp
5A3P84%208V0,841,7Hp
6A3P84%208V0,862,09Hp
7A3P84%208V0,862,44Hp
8A3P84%208V0,862,79Hp
9A3P84%208V0,863,13Hp
10A3P85%208V0,863,53Hp
20A3P85%220V0,867,46Hp
30A3P88%220V0,8912Hp
40A3P88%220V0,8916Hp
50A3P88%220V0,8920Hp
60A3P90%220V0,8924,5Hp
70A3P90%220V0,8928,64Hp
80A3P90%220V0,8932,73Hp
90A3P90%220V0,8936,82Hp
100A3P90%220V0,8940,91Hp
200A3P91%440V0,91169,19Hp
300A3P92%440V0,91256,5Hp
400A3P92%440V0,91342,1Hp
500A3P92%440V0,91427,63Hp
600A3P92%440V0,91513,16Hp
700A3P92%440V0,91598,68Hp
800A3P92%440V0,91684,216Hp
900A3P92%440V0,91769,74Hp
1000A3P92%480V0,91933,02Hp
1100A3P92%480V0,911026,32Hp
1200A3P92%480V0,911119,62Hp
1300A3P92%480V0,911212,9Hp
1400A3P92%480V0,911306,23Hp
1500A3P92%480V0,911399,53Hp
1600A3P92%480V0,911492,8Hp
1700A3P92%480V0,911586,13Hp
1800A3P92%480V0,911679,4Hp
1900A3P92%480V0,911772,7Hp
2000A3P92%480V0,911866Hp
2100A3P92%480V0,911959,3Hp
2200A3P92%480V0,912052,6Hp
2300A3P92%480V0,912145,95Hp