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BMI calculation

Last update date March 5, 2019

It is index that BMI (Body Mass Index: body trout index) divides the weight (kg) by square of height (m) and calculates.

We showed judgment by BMI in Japan Society For the Study of Obesity "adiposity diagnostic criteria 2011" (extra edition adiposity diagnostic criteria 2011 [Vol.17 Extra Edition]) on the face below.

We can calculate normal weight depending on height as standard with BMI = 22.

BMI = weight (kg) ÷ {height (m) X height (m)}

Normal weight (kg) = height (m) X height (m) X 22

We calculate BMI and normal weight

Obese criteria (adult) based on BMI
BMIJudgment

Less than 18.5

The low weight

Less than 18.5-25

The normal weight

Less than 25-30

Obesity 1 degreeObesity 

Less than 30-35

Obesity 2 degrees

Less than 35-40

Obesity 3 degreesBMI 35 or more
High obesity

40 or more

Obesity 4 degrees

・It is determined that BMI exceeds "25" with "obesity"
・It is determined that BMI exceeds "35" with "high obesity"

-Japan Society For the Study of Obesity "adiposity diagnostic criteria 2011" -

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Health and Social Welfare Bureau institute for health infectious disease, epidemiology Information Systems Section

Telephone: 045-370-9237

Telephone: 045-370-9237

Fax: 045-370-8462

E-Mail address [email protected]

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