Example:
15 MeV = 5.7401e-16 calorie (nutritional)
1 MeV = 3.826733e-17 calorie (nutritional) | 1 calorie (nutritional) = 2.613195e+16 MeV
Conversion Steps:
15 × (1.602177e-13 / 4186.8) = 5.7401e-16