Instructions:
1. Enter values for gender, height and weight.
2. The result is interpreted within four categories: Underweight (<5th percentile), Normal weight (5th-85th percentile), Risk of overweight (85th-95th percentile) and Overweight (>95th percentile).
3. The number under "Limits for this age" reprecents the age specifik 5th and 95th percentile.

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For adults, the body mass index limits for overweight and obesity are straight forward (25 and 30). For children this is much more complicated as the limits vary a lot depending on age. This calculator uses the US guidelines that are based on fixed percentiles from a large reference population. 

References

Hammer LD, Kraemer HC, Wilson DM, Ritter PL, Dornbusch SM. Standardized percentile curves of body-mass index for children and adolescents. American Journal of Disease of Child. 1991; 145:259–263.

Pietrobelli A, Faith MS, Allison DB, Gallagher D, Chiumello G, Heymsfield, SB. Body mass index as a measure of adiposity among children and adolescents: A validation study. Journal of Pediatrics. 1998; 132:204–210.

The Centers for Disease Control and Prevention (CDC). BMI - Body Mass Index: BMI for Children and Teens.

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