# Horsepower hour

Physical unit
Unit name Horsepower hour
Unit symbol ${\ displaystyle \ mathrm {hph}}$
Physical quantity (s) energy
Formula symbol ${\ displaystyle W \, E}$
dimension ${\ displaystyle {\ mathsf {M \; L ^ {2} \; T ^ {- 2}}}}$
system Anglo-American system of measurement
In SI units ${\ displaystyle \ mathrm {1 \, hph = 2 {,} 684 \, 520MJ}}$
In CGS units ${\ displaystyle \ mathrm {1 \, hph = 1 \, {PS} \ cdot 1 \, {h}}}$
Derived from Horsepower , hour

Horsepower-hour ( unit symbol : hph ) is a unit of energy that is not permitted in the SI . She describes pictorially speaking, the work , which is capable of accomplishing a horse in one hour (the performance of a horse over the time period of one hour integrated ). Because of certain differences in the definition of a horsepower , the true horsepower-hour not exactly with the previously used in German-speaking horsepower hour (abbreviated PSh) match.

1 hph = 1.014 PSh = 0.7457 kWh