Since height is commonly measured in centimeters, divide height in centimeters by 100 to obtain height in meters.Įxample: Weight = 68 kg, Height = 165 cm (1.65 m)įormula: weight (lb) / 2 x 703Ĭalculate BMI by dividing weight in pounds (lbs) by height in inches (in) squared and multiplying by a conversion factor of 703.Įxample: Weight = 150 lbs, Height = 5'5" (65")Ĭalculation: x 703 = 24.96Īccording to the United States CDC National Center for Health Statistics BMI, height, and weight percentiles show how your child compares to other children. With the metric system, the formula for BMI is weight in kilograms divided by height in meters squared. Measurement Units - Formula and Calculation The calculation is based on the following formulas: The BMI Calculation Formulaīody Mass Index is calculated the same way for both adults and children. It is important to have your doctor perform regular BMI measurements for your child so the doctor can discuss the results with you. In addition you may wish to try our Height to Weight Ratio Chart to measure an average adult's height/weight ratio. NOTE: For Adult male and female BMI measurements you will need to enter your information into our Body Mass Index Calculator for Adults. You can also check your child's Height to Weight Ratio and Infant Growth Percentile Adult BMI Calculator The Child BMI calculator below determines if your child is at a healthy weight for their age (up to 20 years of age), simply enter the required information and calculate their BMI level. Doctors often use a BMI calculation to determine if a child's weight is appropriate for their height and age. Simply put, BMI is a calculation that uses height and weight measurements to calculate how much body fat a person has. BMI can be used as a screening tool but is not diagnostic of the body fatness or health of an individual. A high BMI can be an indicator of high body fatness. When the term BMI is used informally, the units are usually omitted. If pounds and inches are used, a conversion factor of 703 (kg/m2)/(lb/in2) must be applied. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from weight in kilograms and height in meters. The body mass index (BMI), or Quetelet index, is defined as a value derived from the mass (weight) and height of an individual. Bed Mattress Size Chart for US, UK, EU, RV, Trucks.International Prostate Symptom Score (IPSS) Test and Chart.Gestational age, enter in the form of #/7 e.g.To enter feet and inches, enter #' #" e.g., 4' 5" for 4 feet 5 inches To enter pounds and ounces, enter #-# e.g., 8-4 for 8 lb and 4 oz To enter years and months, enter #y #m e.g., 4y 5m Predicted percentiles (and Z-scores) much over the 95th percentile using the CDC charts may be inaccurate.Extremely obese if the BMI is >=120% of the 95th percentile or >=35 kg/m2.Overweight, for BMI >= 85th but = 95th percentile.Includes Weight-for-age, Stature-for-age, Weight-for-stature, and BMI-for-ageĬiting: If you use PediTools for a publication or clinical guideline, please consider citing: Chou JH et al., J Med Internet Res 2020 22(1):e16204 (available open access )Īge (months) OR Date of birth and Date of measure Weight (kg) Height (cm)Ĭategories of obesity for children or adolescents >2 years of age (Styne 2017) 2000 CDC growth charts to report growth metric percentiles and Z-scores on children and adolescents from 2 to 20 years of age.
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