How much should a 23 year old weigh at 5 foot 7 inches?

Answer 1:

If you are girl then your ideal weight should be between 133-147pounds (61-67kg) & if you are boy then your ideal weight should be between 142-154 pounds (65-70kg).

Answer 2:

The above is based on charts, charts that were meant as a guide to physicians. "Ideal" is highly subjective, and only something that you and your physician can know. Not everyone conforms to a graph, nor should they.