Example:
15 horsepower (550 ft·lbf/s) = 1.11855e+16 pW
1 horsepower (550 ft·lbf/s) = 7.456999e+14 pW | 1 pW = 1.341022e-15 horsepower (550 ft·lbf/s)
Conversion Steps:
15 × (745.699871582 / 1e-12) = 1.11855e+16