The normal weight of a 26 year old woman who is 5 foot 7 inches in height ranges from 121 to 153 pounds. The same woman at 159 to 185 pounds is considered overweight. She is considered obese if her weight falls within the range of 191 to 249 pounds.
While knowing your ideal weight is good, it is better to determine your BMI or body mass index using a BMI calculator. BMI gives a fair estimate of the amount of fat in a person's body. If the BMI value is 24.9, she may be overweight, while she would be considered morbidly obese if the BMI value is 40 or above. Assessing the BMI is a better measure of a person's healthy weight than looking at a height-weight chart.