Example:
15 PW = 2.011533e+13 horsepower (550 ft·lbf/s)
1 PW = 1.341022e+12 horsepower (550 ft·lbf/s) | 1 horsepower (550 ft·lbf/s) = 7.456999e-13 PW
Conversion Steps:
15 × (1e+15 / 745.699871582) = 2.011533e+13