How much should a 14 yr old female 5'3" weigh.

Weight: The normal weight range for a 14 year old is usually between about 90-130 lbs. There are still normal weights which are higher or lower than this, but that is the average (around 110 lbs). The most important thing, though, is not the number, but being healthy and fit. A very muscular girl may weigh more because muscles weigh more than fat. If you are concerned, see your doctor.