Childhood Obesity

Calculation Formula

Infants (3 months to 5 years)

• Kaup Index = Weight (kg) ÷ Height (m) ²

Children and Students (Elementary and Middle School)

• Rohrer Index = Weight (kg) ÷ Height (m)³ × 10

Not for use in infants under 3 months of age.

Adults (high school students and older) should use “ Body Mass Index (BMI and Ideal Weight) .”

Assessment Criteria

Kaup Index (Normal Range) Index Assessment 3 months to under 1 year old 16 to less than 18 1 year to under 1 year 6 months 15.5 to less than 17.5 1 year 6 months to less than 3 years old 15 to less than 17 3 years old to 5 years old 14.5 to less than 16.5 *Heisei 14 Year 10 Month Minowa Town Hall Children’s Future Division

Rohrer Index Index Classification Less than 100 Severely underweight 100 to less than 115 Underweight 115 to less than 145 Average 145 to less than 160 Overweight 160 or higher Severely overweight *Japan Medical Association

If the Kaup Index is below the normal range, it indicates “underweight”; if it is above the normal range, it indicates “overweight.”

Beware of Unhealthy Diets

If children follow unhealthy diets, it can lead to impairments in bodily functions necessary for childbirth and pregnancy in the future, or cause conditions such as osteoporosis to develop at an early age. For more details, please visit the Ministry of Agriculture, Forestry and Fisheries website.

*This site assumes no responsibility whatsoever for calculation results or other information. We also do not provide individual consultations.