The calories on food labels are actually kcal. In thermodynamics, 1 cal = 4.184 Joules which is the energy required to heat one gram of pure water by 1 degree Celsius IIRC. Which isn't very much when it comes to human nutrition (especially for fattys haha), so for whenever food science came around they used kcal as the common unit but called them Calories with a big C (don't ask me why), instead of kilocalories or kcal. I think some countries with non-retarded unit systems (not Freedomland) actually have "kcal" on their labels. One 12 oz Miller Lite (dont judge me people, I've got a figure to maintain) = 100 kcal = 100 = Calories = 100,000 calories