Standard Methods for Determining Body Fat Using Body Circumferences, Height, and Weight, page . 23. C. Weight Loss, Percent fat estimates for females-Continued Also, girls and boys differ in their amount of body fat as they mature. This is why BMI for children, also known as BMI-for-age, includes gender and age. This calculator gives an approximate BMI for children from ages 5 to 18. It will tell you if a child is underweight, at an ideal weight, at risk of being overweight, or is now overweight. The Basal Metabolic Rate (BMR) Calculator estimates your basal metabolic rate—the amount of energy expended while at rest in a neutrally temperate environment, and in a post-absorptive state (meaning that the digestive system is inactive, which requires about 12 hours of fasting). US Units. Metric Units. Other Units. How to Calculate Your Muscle Mass Percentage? In order to find your lean muscle mass you have to take your lean muscle mass percentage and divide by a hundred, so for example if you have a lean body mass percentage of 30, you will get 0.3 , then what you have to do is divide your total body mass by the decimal that you just calculated to get to Your BMI: Body Mass Index Scale. Underweight: less than 18.5. Normal weight: 18.5 - 25. Overweight: 25 - 30. Obesity: greater than 30. Body Mass Index (BMI) is calculated using your height and weight and is approximately related to body fat percentage. Calculate your BMI and visualize your 3D body model WebGL. Body mass index (BMI) is a calculation that estimates a person’s body fat using their height and weight. A BMI of 18.5–24.9 is considered “normal” weight with a low risk of poor health For men, the recommended amount of body fat is between 13 and 17 percent. The average American man has about 17 to 19 percent body fat. To determine your ideal body weight, try this formula: Women: 100 pounds of body weight for the first 5 feet of height + 5 pounds for each additional inch. Men: 106 pounds of body weight for the first 5 feet of BMI is a measurement that takes into account your height, and weight to produce a calculation. This calculation is a measurement of your body size and can be used to determine how your body weight is related to your height. It is a method of determining whether you may be underweight, average weight, overweight, or obese, but it has flaws . Ick5u8.