The amount of weight to lose by diet can be calculated using the current body weight and percent body fat.
Fat-free body weight should be used over lean body weight since lean body weight assumes a small amount of body fat.
(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.
minimum body fat
maximum acceptable for US Navy
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.
To read more or access our algorithms and calculators, please log in or register.