Example:
15 pW = 2.011533e-14 horsepower (550 ft·lbf/s)
1 pW = 1.341022e-15 horsepower (550 ft·lbf/s) | 1 horsepower (550 ft·lbf/s) = 7.456999e+14 pW
Conversion Steps:
15 × (1e-12 / 745.699871582) = 2.011533e-14