Amps to HP conversion calculator is a useful tool that can be used to convert Amps to HP in DC circuits, Single phase, and three-phase AC circuits.
List of Contents
Amps to HP Calculator
Amps to HP Conversion Formulas
- DC Amps to HP: HP = (E * I * %EFF)/746
- AC Single-phase Amps to HP: HP = (E * I * %EFF * PF) / 746
- AC Three-phase Amps to HP: HP = (1.73 * E * I * %EFF * PF) / 746
where HP = Horsepower
E = Voltage
I = Amps
%Eff = Percentage Efficiency
PF = Power factor (In AC Circuits only)
Solved Examples with Calculations
Amps to HP in DC Circuits
A 12-volt dc motor having an efficiency rating of 94% draws a current of 4 amperes. Convert DC Amps to HP
Solution:
HP = (E * I * %EFF)/746
= (12 * 4 * 0.94)/746
= 0.0604 HP
AC Single Phase Amps to HP
A 115-volt single-phase AC Motor having power factor 90% has an efficiency rating of 93%. Having amps to be 4 A. Convert AC single phase amps to HP
Solution:
HP = (E * I * %EFF * PF) / 746
= (115 * 4 * 0.93 * 0.9) / 746
= 0.516 HP
Values that are closer to 0.5 HP can be written as 1/2 HP
AC Three phase Amps to HP
A three phase 400 volt motor having power factor 80% and efficiency rating of 95% draws a current of 25 Amps.Convert AC three phase Amps to HP.
Solution:
HP = (1.73 * E * I * %EFF * PF) / 746
= (1.73 * 400 * 25 * 0.95 * 0.8)/746
= 17.62 HP