Horsepower-hour to standard cubic feet conversion calculator shown above calculates how many standard cubic feet are in 'X' horsepower-hour (where 'X' is the number of horsepower-hour to convert to standard cubic feet). In order to convert a value from horsepower-hour to standard cubic feet (from hph to scf) just type the number of hph to be converted to scf and then click on the 'convert' button.