Example:
15 GW*h = 20394324.259559 metric horsepower-hour
1 GW*h = 1359621.617304 metric horsepower-hour | 1 metric horsepower-hour = 7.354988e-7 GW*h
Conversion Steps:
15 × (3.6e+12 / 2647795.5) = 20394324.259558566