U.S. Army Weight Requirements
The U.S. Army has a detailed chart by height to simply calculate the ideal weight for younger and older women. According to the chart, the ideal weight for a 5-foot tall older woman (40 years old or older) is 127 lbs. For every additional inch, the army allows for an additional 4 or 5 lbs.
U.S. National Center for Health Statistics
The U.S. National Center for Health Statistics lists the ideal weight for women by age, giving a weight of 139 to 142 lbs. as the ideal weight for a 5-foot tall woman who is between 40 and 64, with an additional 3 lbs. for every inch.
While most would like to weigh less, scientific evidence from a study furnished by Dr. Asefeh Heiat for the Department of Veterans Affairs, points to the fact, that for older women, it is better to be slightly heavier than meeting stringent weight requirements. A lower mortality rate in older women is noted for those who are on the moderately heavier (not obese) end of the scale.