Example:
15 metric horsepower-hour = 2.478936e+20 MeV
1 metric horsepower-hour = 1.652624e+19 MeV | 1 MeV = 6.050983e-20 metric horsepower-hour
Conversion Steps:
15 × (2647795.5 / 1.602177e-13) = 2.478936e+20