1 horsepower = 0.745699872 kilowatts
you would convert it when you want a metric measurement for horsepower
an example
400 horsepower(mechanical) = 298.2799 kilowatt
I believe the question is wrong. KWH or kilowatt Hour is a unit of energy. Horse Power is a unit of power. They do not interchange. To convert kilowatts, which is a unit of power, into Horse Powers,...
There are too many variables to convert brake horsepoer to horsepower with a simple equation, it has to do with power transmission. the "brake" horsepower is the amount of power at the flywheel (the...