Example:
15 horsepower (550 ft·lbf/s) = 1.11855e-14 EW
1 horsepower (550 ft·lbf/s) = 7.456999e-16 EW | 1 EW = 1.341022e+15 horsepower (550 ft·lbf/s)
Conversion Steps:
15 × (745.699871582 / 1e+18) = 1.11855e-14