![]() ![]() Being well underweight is a health hazard and using the BMI can let you know how much you would need to gain to return to a normal and healthy weight. We always hear about the dangers of being obese, but this type of information is also helpful to letting someone know when they are dangerously underweight. This is the formula in the metric system: This is the forumla, in the imperial system for BMI calculation: Since there is more mass, the ratio result of body fat will be different than someone who is shorter. Height has a direct effect on BMI because the taller you are, the more mass you will have. Here are the rankings and what they mean: Generally speaking, your BMI tells you your current weight status. This simply means there is no magic number, weight-wise that could cover a normal level for women as the BMI will change you age. As you age, the BMI changes as well:Īs can be seen, the normal ranking changes over time and, around the age of 57, it actually begins to drop again. In order to fit into the normal range for a woman, your results will fall into a percentage and that number is used to place you into one of the BMI categories mentioned above.Īt the age of around 15 years, the BMI index for a normal result is around 16 to 17. The Children’s BMI Tool for Schools School staff, child care leaders, and other professionals can use this spreadsheet to compute BMI for as many as 2,000 children. Use this calculator for children and teens, aged 2 through 19 years old.
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