Example:
15 metric horsepower-hour = 2.478936e+23 keV
1 metric horsepower-hour = 1.652624e+22 keV | 1 keV = 6.050983e-23 metric horsepower-hour
Conversion Steps:
15 × (2647795.5 / 1.602177e-16) = 2.478936e+23