Are you overweight or about normal if you are 12 years old and you weigh about 116-120?

You are underweight - your BMI is 15.2 and the healthy range is 19.5 to 24.9. You are however young which tends to mean you will be slimmer but technically you are underweight.

The best way to figure your healthiest weight is by your height. For 5 feet you should weight 100 lbs. and for every inch more you should weight an extra five lbs. For example, if you are 5 ft. 1 in. you should weight 105. If you are 5 ft. 2 in. you should weigh 110 and so on. Hope that helps.