I ate 2300 calories today will i gain weight?

No you will not. If you continue to intake more calories than your regular daily caloric intake however then you will gain weight. Just basic stuff here.

Not if it’s just once or twice in a while

More than likely you won't due to your up coming bowel movement.

If you eat a bit over just occasionally, it's fine - the excess amount will just work its way out of your system in a matter of days. If you eat excessive amounts on a regular basis, you can count on some gains.

You would need to eat 3500 calories over your TDEE to gain one pound. You would have to eat about 5500 calories in a day for that to happen

Sis i need ur routine on how to eat that much....

But also, your weight would remain the same with 2000 calorie intake

Unless you are playing sports-- I suggest 1800-- you are great at 5-6 120--muscle tone will add to your shape -so workout

dude ur fine. if u count ur calories than im sure u eat healthy on a regular basis

No, one big meal does not make you fat. To get fat, you have to eat fatty foods, etc over a long period of time.

nnaybe not since youre young you probably have a faster nnetabolisnn