I'm a 17 year old girl and i'm 5"1 or 5"2, i weigh 220 is that overweight?? and what's the normal weight i'm suppose to weigh?

Yes: Based on your height and not knowing your "build" athletic, etc you are overweight. The average build female your height should weight approx 100-130 lbs.

Yes, Lose it!: Heather, unless a typo and you meant '120', the answer is definitely yes. Get on an exercise program, and a low carbohydrate diet, avoid processed and fast food. Obesity is associated with 'Metabolic Syndrome', Insulin Resistance. At your age, you can experience menstrual irregularity, difficulty w/ getting pregnant; and Diabetes, Hypertension and Stroke early in life!

Yes, overweight.: Based on the information you provided your BMI is 40.2, this would be classified as obese. This puts you at risk for developing a number of diseases including diabetes. The "ideal weight" for your age and height is between 123 and 140 lbs. This is only a calculation and does not take into account your individual circumstances.

Obesity: BMI is a measure of ones weight to height. Normal BMI is 18 - 24. BMI of 25 is overweight. BMI of 30 is Obese and BMI of greater than 35 is morbid obesity. Your BMI is 40. To bring your weight to normal, for a height of 5' 2", it would have to be 136lb.