Comments and Admiration of a body fat percentage formula
The body fat percentage formula, using your BMI, age, and gender:
Child Body Fat % = (1.51 x BMI) – (0.70 x Age) – (3.6 x gender) + 1.4
Adult Body Fat % = (1.20 x BMI) + (0.23 x Age) – (10.8 x gender) – 5.4
using gender male= 1, female= 0.
There are other ways to find formulas for body fat.1 written by other scientists. Reference 1 is another place to look.
- Jackson AS, Stanforth PR, Gagnon J, et al. The effect of sex, age and race on estimating percentage body fat from body mass index: the Heritage Family Study. Int J Obes Relat Metab Disord, Jun 2002;26(6):789-96
There is a problem with this formula, and others like it. They are linear.
But Body fat percentage has a curved distribution relative to body mass index, not linear.
January 20, 2015 update. A crazy thing I discovered. Someone copied my paragraph and pasted it into Yahoo Answers, and now when I search Google for that paragraph, it only shows Yahoo answers, and not my own page. So the more powerful domain wins, and my page gets penalized as duplicate content. That sucks. And they didn’t even give this page a link. Please don’t do that in the future. Just link here instead please. Each page that is penalized by google, weighs down the entire website.
Lets rephrase the question. If you know your BMI, do you also know your body fat percentage? The answer is yes, but only if you are kindof average in all respects. The above formula works, if you are average height, average weight, age around 30.
Is Body fat a better measurement than body mass index? YES. yes. well, maybe, It’s a coin toss.