Ideal weight at 5 ft 9 in, female
Three formulas give three answers, and the gap between them is your range. Here they are for a woman standing 5 ft 9 in.
How it works
The three formulas differ only in their numbers. Each adds a set number of kilograms per inch above 60 inches to a base weight for your sex. The range runs from the lowest result to the highest. This female page uses 9 inches over the 60 inch base, at 5 ft 9 in.
Worked example
Subtract 60 from the height. 5 ft 9 in gives 9 inches. Now use the female numbers. Devine: 45.5 + 2.3 × 9 = 66.2 kg. Robinson: 49 + 1.7 × 9 = 64.3 kg. Miller: 53.1 + 1.36 × 9 = 65.34 kg. In pounds that is 146 lb, 142 lb and 144 lb. The range is 142 to 146 lb.
Common questions
Which ideal weight formula is best?
None is better than the others. They were built for different purposes. Showing all three as a range is more honest than picking one. For a woman at 5 ft 9 in the three results are 146 lb, 142 lb and 144 lb.
Why do the formulas give different answers?
Each uses its own base weight and its own amount per inch. The gap grows as height moves away from 5 feet. For a woman at 5 ft 9 in the gap between the lowest and highest is 4 lb.
Do these formulas account for muscle or frame size?
No. They use only height and sex. Someone with a large frame or a lot of muscle can be healthy well above the range. For a woman at 5 ft 9 in the range of 142 to 146 lb is a starting point, not a limit.
Is 142 to 146 lb a target I must hit?
No. It is a starting reference for a woman at 5 ft 9 in. Your doctor can tell you what weight suits your own health. For a woman at 5 ft 9 in the range spans 4 lb.
What if I am under 5 feet tall?
The formulas were written for heights of 5 feet and over. Below that the calculator uses the base weight. Treat the result as rough. For a woman at 5 ft 9 in the formulas add 9 inches above the 60 inch base.