How To Calculate Amps From Horsepower

Amps measure electrical current. Horsepower is the amount of energy a motor creates when in use. Given horsepower and volts, it is possible to calculate amps. The calculation of amps uses Ohm's Law, which is amps times volts equals watts.

Step 1

Multiply the horsepower by 746 watts. For example, an engine at two horsepower with 230 volts would be calculated as two horsepower times 746 watts, which equals 1492.

Step 2

Divide the number calculated in Step 1 by the amount of volts to calculate watts. In the example, 1492 would be divided by 230, which equals about 6.49 amps.

Step 3

Check the calculations. It is always helpful to look over any mathematical calculations in order to reduce the risk of mathematical errors.