How much weight will I gain from eating bad 1 day?

-I am a very healthy eater, but today was just one of those days where I craved everything. I ate The crusted tilapia And 2 biscuits at red lobster, then came home and ate chocolate ice cream and a rice crispie treat. Lol. Anyway I never eat like this, and I'm just wondering if I'll gain any weight from it. By the way, i did burn 500 calories on my elliptical today, but I know thats nothing compared to what i ate.It depends on several things, the type of food you ate, the exact calories and your metabolism. Most likely, if you are an "average person" you could see a 2-3 pound weight gain, which will most likely occur as water weight from the high sodium count that is most of Red Lobster's (an most restaurants) food that will easily be burnt off in the next few days.I don't think you will gain any weight, if you exercise regularly. If you eat healthy and take one day for yourself that's great,