Calories eating per day?

Question

if a person were 14 yrs old, 5ft tall,

how many calories would they have to eat per day to gain weight if they weighed 81 lbs.

how many calories would they have to eat a day to maintain their weight at 87-90 lbs?

Answer 1

You need to be around 95lbs. Eat a high calorie diet....like around 2000-2500 a day to gain some weight. And to maintain a weigh eat around 1600-2000 a day.

Answer 2

You should have about 15 calories per body pound of weight to maintain.  If you eat more than than you should gain, but everyones metabolism is different.  Some are just naturally lean.