counting calories is a waste
your body upregulates and down regulates your metabolism in response to intakes
for example when you binge say during thanksgiving dinner and take in 3000 calories
I'd estimate around half those calories don't even get absorbed/digested
on the flip side say you put yourself on a 1000 calorie a day diet
within a week your body will become more efficient at calorie conservation
how the hell do you think forced slave labor survives on those minimal servings(e.g. the nazi's labor camps)?