Ideal weight at 6 ft 3 in, male
Three formulas give three answers, and the gap between them is your range. Here they are for a man standing 6 ft 3 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. For a man at 6 ft 3 in the Devine base is 50 kg.
Worked example
Subtract 60 from the height. 6 ft 3 in gives 15 inches. Now use the male numbers. Devine: 50 + 2.3 × 15 = 84.5 kg. Robinson: 52 + 1.9 × 15 = 80.5 kg. Miller: 56.2 + 1.41 × 15 = 77.35 kg. In pounds that is 186 lb, 177 lb and 171 lb. The range is 171 to 186 lb.
Common questions
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 man at 6 ft 3 in the range of 171 to 186 lb is a starting point, not a limit.
Is 171 to 186 lb a target I must hit?
No. It is a starting reference for a man at 6 ft 3 in. Your doctor can tell you what weight suits your own health. For a man at 6 ft 3 in the range spans 15 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 man at 6 ft 3 in the formulas add 15 inches above the 60 inch base.
How does this compare with BMI?
A healthy BMI range also gives a weight range for your height. The two often overlap but they are not the same, because BMI ignores sex while these formulas use it. For a man at 6 ft 3 in a healthy BMI is 148 to 199 lb, against 171 to 186 lb here.
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 man at 6 ft 3 in the three results are 186 lb, 177 lb and 171 lb.