A 1 horsepower motor with 75% effiency will require 994. 26 watt
Explanation:
To calculate the effiency, 1 horsepower is equivalent to 745.7 watts
1hp= 745.7 w
So, by using a rule of three the calculation its like this:
745.7 ⇒ 100%
X ⇒ 75%
The information about the volts in this example is not required, but it can be used to calculate the current.