Without knowing which food product, it's hard to give an answer. However, if you look on the back of the package, it will have the serving size and that is how much you can have per the calories that it states on the back.
500
One pound is 3,500 calories.
There are about 236 calories in one can of gravy.
3,178 calories!
About 300 calories.
about 140 calories
Roughly 3 calories
3,500 calories.
3500 calories
60 calories
20 calories for one piece
One gram of fructose has 3 calories