![]() These recommended distinctions along the linear scale may vary from time to time and country to country, making global, longitudinal surveys problematic. Recent studies in Britain have indicated that females between the ages of 12 and 16 have a higher BMI than males of the same age by 1.0 kg/m 2 on average. Children with a BMI between the 85th and 95th percentile are considered to be overweight. Instead of comparison against fixed thresholds for underweight and overweight, the BMI is compared against the percentiles for children of the same sex and age.Ī BMI that is less than the 5th percentile is considered underweight and above the 95th percentile is considered obese. It is calculated in the same way as for adults but then compared to typical values for other children of the same age. BMI Calculator by Age and Gender BMI in Children: aged 2 to 20īMI for age percentiles for girls 2 to 20 years of age. The BMI (Body Mass Index) in (kg/m 2) is equal to the mass in pounds (lbs) divided by the square height in inches (in) times 703:īMI (kg/m 2) = mass (lb) / height 2 (in) × 703 BMI CategoryīMIs under 20 and over 25 have been associated with higher all-causes mortality, with the risk increasing with distance from the 20–25 range. The BMI (Body Mass Index) in (kg/m 2) is equal to the mass in kilograms (kg) divided by the square height in meters (m): Obesity and bmi BMI Categories Table BMI Category The dashed lines represent subdivisions within a major class.īMIs under 20 and over 25 have been associated with higher all-cause mortality, with the risk increasing with distance from the 20–25 range. Please seek further advice from your GP.A graph of body mass index as a function of body mass and body height. If you're suffering from an eating disorder, the BMI calculator results do not apply. Your can use your BMI result as a starting point for further discussion with your GP about your weight and your general health.įind out more in How your GP can help and check out the Change4Life website for practical tips on staying healthy as a family. However, the BMI is a relatively straightforward and convenient method of assessing someone's weight. adults who lose muscle as they get older may fall in the "healthy weight" range even though they may be carrying excess fat.very muscular adults and athletes may be classed "overweight" or "obese" even though their body fat is low. ![]() The adult BMI does not take into account age, gender or muscle mass. The BMI can't tell the difference between excess fat, muscle, or bone. Your BMI can tell you if you're carrying too much weight but it can't tell if you're carrying too much fat. If you're concerned about your child's weight, contact your GP who may be able to refer you to your local healthy lifestyle programme for children, young people and families. Measuring waist size is not routinely advised for children because it doesn't take their height into account. For example, a girl on the 75th centile is heavier than 75 out of 100 other girls her age. Find out more in very overweight childrenĪ child's BMI is expressed as a "centile" to show how their BMI compares to children who took part in national surveys. If you're concerned about your child's weight, see your GP. Get tips on how to encourage your child to be more active and eat well healthy weight: between the 2nd and 91st centiles.underweight: on the 2nd centile or below.The BMI calculator works out if a child or young person is: Obese children are thought to be at increased risk of a variety of health conditions, and they're also more likely to be overweight or obese as adults. For children and young people aged two to 18, the BMI calculator takes into account age and gender as well as height and weight.
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