How many calories?

So, I am in excess of 350 pounds. I am getting prepared to go for a gastric bypass in the coming months. I want to loose about 25 to 30 pounds before then. How many calories do I need to restrict myself to daily, if I want to acheive this goal in say 3 to 4 months? Any other tips for loosing weight?

um the daily calories your supposed to eat a day is 2,000 plus exercising
so if you weigh 350 lbs then you would have to cut down a lot.
but 3 or 4 months won't do it. Dieting takes a while. So I say try to good!!

you need to find out your BMR.
that's how many calories your body burns everyday just to keep you alive.
there are online calculators.
I suggest eating about the amount of cal's that are your BMR.
for instance if you BMR is 1,800...eat 1,800 cal's...if you do no excercise you'll still be at -1,800 cal's.
of course take off the calories you burn if you do excercise.
each 900 al's you are in the minus is apparently 1lb lost!