extra calories

I know the math - 3500 extra calories = 1 pound. However, if you eat an extra 600 - 700 calories and do not burn it off, then technically does that mean you will still store every last bit of the extra calories as weight? Scientifically, does every little bit of extra energy have to be stored if it is not burned?  I want to know exactly what happens to small amounts of excess calories, for example, 600 extra calories in a one month period. Technically, if the 600 calories are never compensated for, will that contribute to any excess weight?  Or, do small amounts of calories just dissipate over time…….

I am curious about the exact science of what happens.  Is it really as accurate as every extra calorie yields a certain amount of extra weight?  Is it that technical? Or is the body less picky.

Calories that aren't burnt are stored.  If you would eat 600 calories a month that your body doesn't burn then in approximately 6 months you will gain one pound.  That's why you can make tiny changes in what you do or what you eat and eventually you will see a change in your weight.   That's how people gain say 10 pounds in a year all the while swearing they haven't changed anything.  But they forgot the latte they started having everyday instead of black coffee.

Sad but true.

I know that 500 calories adds up over time, but I am wondering what happens  if over the space of one year, a person over eats 500 - 1000 extra calories than their body needed;  does the body store every last bit of the extra 500 calories as 0.0000987868  of a pound?       

I am interested in to know if the body is 100% accurate in terms of the extra calories it burns or stores. Over 12 months, if a person only eats 500 extra calories on ONE given day, and eats within their limits every other day,  then I wonder if the body COSNDIDERS that tiny amount of extra? It just sounds like such an insignificant amount, that I wonder if the  body does bother storing 1/100000000000th of a pound...

I plan to do food science at Uni next year or the year after, so hopefully I will learn the exact science of it lol, and how accurate the body is in this respect.