There's no ideal weight that's specific for Americans, and w/o knowing the length of the person it's hard to give a good recommendation.
An ideal weight does not vary with age. Search for "ideal weight calculator." Your answer is probably around 170 pounds.
200lbs
Age is a factor. According to Halls-MD the ideal weight for a male 4'8" age 7 through 18 is 78 lbs. For the age of 19 and up, it is 89 lbs.
ideal weight depends on height not on age.
In order to determine ones ideal weight, besides the age, the height, gender (male or female), and current weight must be taken into consideration.
Body weight is a misleading measure. There is no ideal weight for a 20-year-old male. Weight is related to height and body composition rather an age. What counts more than your body weight is your body fat percentage. To learn more about body fat percentage, see the page link, further down this page, listed under Related Questions
The American Medical Association has published a chart that lists the ideal weight range for different heights. Age is not important. According to that chart, the ideal weight for boys who are 5'2" is 106-130 pounds, and the ideal weight for girls who are 5'2" is 99-121 pounds.
At your age you should be less than most adults are concerned about their height and weight because your body is changing rapidly. For this reason, it's difficult to say what your ideal weight is. It's also dependent upon your frame size. Also, you didn't specify if you're male or female. At 5'3'' as a male, your ideal weight should be in the range of 130-153 lbs depending on your frame size, i.e. small, medium, large. For a female, your ideal weight should be in the range of 111-147 lbs. Remember these figures are for adults and you should probably be a bit less as a 15 year old.
Weight is calculated by height not age.
The ideal weight for a woman that height and age can be anywhere between 105-140 pounds. It can also vary - depending on your frame size, you can weigh more/less than that and still be considered an ideal weight!
my full grown male border collie weighs 20kg, he is 22 inches tall at the shoulder. Normal weight will differ for gender, age, and height of the dog, but should be around 35-35 pounds (14-20 kg) for males and 27-42 pounds (12-19 kg) for females.
To determine your ideal weight, the information should include height, age, gender, and current weight. For example, if you are 4'10, 95.5 pounds, 18 years old, and female, your ideal weight (according to Halls-MD) would be 86 lbs. For a male it would not be much different at 87 lbs.