ma26, that 100 pounds at 5 ft. and 5 pounds for each inch above is a one-size-fits-all standard. It would put me at 115, and I simply can never reach that weight. At 18 years old I weighed close to that, and I was rail-thin and exhausted. (I was working as a motel maid that summer, a highly demanding physical job.)
I hope people will look around at several different tools for "ideal weight." They vary widely. For me, the range is 115 to 140, which is a pretty big range.
"My religion is kindness." --His Holiness the Dalai Lama