Fat-free body weight should be used over lean body weight since lean body weight assumes a small amount of body fat.
Parameters:
(1) body weight in kilograms
(2) fat-free body mass or percent body fat
(3) target percent body fat for gender
percent body fat =
= ((body weight) - (fat-free body weight)) / (body weight) * 100%
The target percent body fat is never 0%. Both males and females require a minimum amount of fat to be healthy.
|
Criterion
|
Men
|
Women
|
|
minimum body fat
|
2-4%
|
6-8%
|
|
maximum acceptable for US Navy
|
22%
|
30%
|
desired weight after weight loss in kilograms =
= (fat-free body mass in kilograms) * 100 / (100 - (target percent body fat))
amount of weight loss in kilograms =
= (current body weight) - (desired weight after weight loss)
Normally weight loss should be at a rate of 0.23 to 0.45 kilograms (0.5 to 1.0 pounds) per week.
