Example:
15 calorie (nutritional) = 1.7445e-8 GW*h
1 calorie (nutritional) = 1.163e-9 GW*h | 1 GW*h = 859845227.858985 calorie (nutritional)
Conversion Steps:
15 × (4186.8 / 3.6e+12) = 1.7445e-8