How to Calculate Amps From Horsepower

By Carter McBride; Updated April 24, 2017
Calculating amps

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.

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.

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.

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

About the Author

Carter McBride started writing in 2007 with CMBA's IP section. He has written for Bureau of National Affairs, Inc and various websites. He received a CALI Award for The Actual Impact of MasterCard's Initial Public Offering in 2008. McBride is an attorney with a Juris Doctor from Case Western Reserve University and a Master of Science in accounting from the University of Connecticut.