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

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:

• I_DC=Direct current.
• I_AC1Ø=Current/Ampere 1 phase.
• I_AC2Ø=Current/Ampere 2 phase.
• I_AC3Ø=Current/Ampere 3 phase.
• H.P=Horsepower.
• V_DC=Voltage direct current.
• VL-N=Voltage line to neutral.
• V_L-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