Bodyfat(kg)male = (0.988 × BMI) + (0.242 × weight) + (0.094 × age) - 30.180
Bodyfat(kg)female = (0.988 × BMI) + (0.344 × weight) + (0.094 × age) - 30.180
The formulas provide an estimation of body fat percentage based on BMI, weight, and age. It's important to note that these formulas have limitations and may not be highly accurate for everyone. Individual variations and factors such as muscle mass, bone density, and distribution of fat can influence the results.
One study related to body fat estimation is the research conducted by Heitmann BL, titled "Evaluation of body fat estimated from body mass index, skinfolds, and impedance: A comparative study." The study was published in the European Journal of Clinical Nutrition in 1990 (44(11): 831-837). It evaluated different methods of estimating body fat, including BMI, skinfolds, and impedance.
It's important to consult with a healthcare professional or a registered dietitian for a comprehensive assessment of body composition and personalized advice regarding body fat management.