horsepower-hour

[ hawrs-pou-er-ouuhr, -ou-er ]

noun

1. a foot-pound-second unit of energy or work, equal to the work done by a mechanism with a power output of one horsepower over a period of one hour.

horsepower-hour

noun

1. an fps unit of work or energy equal to the work done by 1 horsepower in 1 hour. 1 horsepower-hour is equivalent to 2.686 × 10 ⁶joules

Word History and Origins

Origin of horsepower-hour¹

First recorded in 1895–1900