Online tool to convert from Amp to HP , with the explanation of the formula used in the conversion.
In addition to several examples , a table of Amp to HP and the common values of efficiency and power factor for electric motors.
Amp to Hp calculation formula, DC, AC, 3 phase, 2 phase, 1 phase:
- 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.
How to convert Amp to Hp AC 3 phases in only 1 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.
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.
Amp to Hp conversion chart-table:
| Amp AC | Phases | Efic. | Volt. | Pf | Hp |
| 1A | 3P | 78% | 208V | 0,84 | 0,31Hp |
| 2A | 3P | 78% | 208V | 0,84 | 0,63Hp |
| 3A | 3P | 78% | 208V | 0,84 | 0,94Hp |
| 4A | 3P | 78% | 208V | 0,84 | 1,26Hp |
| 5A | 3P | 84% | 208V | 0,84 | 1,7Hp |
| 6A | 3P | 84% | 208V | 0,86 | 2,09Hp |
| 7A | 3P | 84% | 208V | 0,86 | 2,44Hp |
| 8A | 3P | 84% | 208V | 0,86 | 2,79Hp |
| 9A | 3P | 84% | 208V | 0,86 | 3,13Hp |
| 10A | 3P | 85% | 208V | 0,86 | 3,53Hp |
| 20A | 3P | 85% | 220V | 0,86 | 7,46Hp |
| 30A | 3P | 88% | 220V | 0,89 | 12Hp |
| 40A | 3P | 88% | 220V | 0,89 | 16Hp |
| 50A | 3P | 88% | 220V | 0,89 | 20Hp |
| 60A | 3P | 90% | 220V | 0,89 | 24,5Hp |
| 70A | 3P | 90% | 220V | 0,89 | 28,64Hp |
| 80A | 3P | 90% | 220V | 0,89 | 32,73Hp |
| 90A | 3P | 90% | 220V | 0,89 | 36,82Hp |
| 100A | 3P | 90% | 220V | 0,89 | 40,91Hp |
| 200A | 3P | 91% | 440V | 0,91 | 169,19Hp |
| 300A | 3P | 92% | 440V | 0,91 | 256,5Hp |
| 400A | 3P | 92% | 440V | 0,91 | 342,1Hp |
| 500A | 3P | 92% | 440V | 0,91 | 427,63Hp |
| 600A | 3P | 92% | 440V | 0,91 | 513,16Hp |
| 700A | 3P | 92% | 440V | 0,91 | 598,68Hp |
| 800A | 3P | 92% | 440V | 0,91 | 684,216Hp |
| 900A | 3P | 92% | 440V | 0,91 | 769,74Hp |
| 1000A | 3P | 92% | 480V | 0,91 | 933,02Hp |
| 1100A | 3P | 92% | 480V | 0,91 | 1026,32Hp |
| 1200A | 3P | 92% | 480V | 0,91 | 1119,62Hp |
| 1300A | 3P | 92% | 480V | 0,91 | 1212,9Hp |
| 1400A | 3P | 92% | 480V | 0,91 | 1306,23Hp |
| 1500A | 3P | 92% | 480V | 0,91 | 1399,53Hp |
| 1600A | 3P | 92% | 480V | 0,91 | 1492,8Hp |
| 1700A | 3P | 92% | 480V | 0,91 | 1586,13Hp |
| 1800A | 3P | 92% | 480V | 0,91 | 1679,4Hp |
| 1900A | 3P | 92% | 480V | 0,91 | 1772,7Hp |
| 2000A | 3P | 92% | 480V | 0,91 | 1866Hp |
| 2100A | 3P | 92% | 480V | 0,91 | 1959,3Hp |
| 2200A | 3P | 92% | 480V | 0,91 | 2052,6Hp |
| 2300A | 3P | 92% | 480V | 0,91 | 2145,95Hp |