Example:
15 MW*h = 51216389.245802 Btu (th)
1 MW*h = 3414425.94972 Btu (th) | 1 Btu (th) = 2.92875e-7 MW*h
Conversion Steps:
15 × (3.6e+9 / 1054.349999974) = 51216389.245801814