Horsepower refers to the power an engine produces. It's calculated through the power needed to move 550 pounds one foot in one second or by the power needs to move 33,000 pounds one foot in one minute. The power is gauged by the rate it takes to do the work.

Formula

hp = Fd/t

hp = horsepower

F = force in pounds

d = distance in feet

{t} = time in minutes