The BMI percentile and trend of percentile for age and sex determines whether the child is:
underweight (<5th percentile),
normal weight (between 5th and 85th percentile),
overweight (BMI ≥85th percentile and <95th percentile)
obese (≥95th percentile)
BMI percentiles also can be determined using a calculator for boys (calculator 1) and for girls (calculator 2). Management strategies vary accordingly.