First of all don't let these people on here make you feel bad for being concerned about your body and being SMART enough to ask questions about it. Ultimately a healthy weight to height ratio depends on many factors. It is not as simple as falling into the appropriate range in the chart below. What is an appropriate weight will be based on your age, height, build, and percentage of body fat. A highly physical teen boy with great muscle tone could easily look overweight based on the standard average height and weight chart. This is due largely to the fact that muscle cells weigh more than fat cells.
Due to this, a more common measure of average healthy bodies is based on a formula known as the Body Mass Index or BMI. This index is a number calculated from your weight and height – weight divided by your height squared. For an easy to use BMI calculator and evaluation, visit the CDC’s website.
Another important consideration is growth rate. This is unique to children and teens, as their BMI, average height and weight will flux as bodies are developing. One of the many reasons adult averages should never be used to evaluate teenagers. Ultimately, the best evaluation is the one performed by a pediatrician. At each physical exam, height and weight should be measured, tracking progress on an individualized chart. This general health screen is recommended every two years for teenagers, aged 11 to 24 years.
Here is a standard chart.
Height and Weights for Teen Girls.
Age Range Height Weight Percentile
12-13 years 60 – 63 inches 95 – 105 lbs
14-15 years 63 – 64 inches 105 – 115 lbs
16-17 years 64 inches 115 – 120 lbs
18-20 years 64 inches 125 – 130 lbs
Here's some links to sites that were designed for people your age.
http://kidshealth.org/teen/food_fitness/dieting/weight_height.html#
http://www.shapefit.com/kids-exercise-programs.html
http://www.fitnessandmind.com/
參考: Body Builder.
Fitness Buff.