What should I weigh?

I am 13 and 5 feet 11 inches and about 140 pounds
I dont think ime fat but sometimes I am called that? what shoud I weigh?

no way - you are NOT fat!.. don't know what you should weight , but you can google this- "BMI index" - body mass index -- it gives you a chart.

don't listen to her. your weight is a okay. If people really are calling you that it 's their problem not you. I once made the mistake of calling my sister that(we were having a little fight at the time) and she said to me, yeah, well, I can lose weigh but ugly don't wash off. I think we were ten at the time. So the next time some screwball calls you that, just think that line to yourself, you'll recover from the blow in no time flat.

you sound pretty skinny, I'd say average weight for someone as tall as you is 155-170 lbs