BMI Calculator
Calculate BMI, the corresponding weight category, and standard weight from height and weight.
- BMI
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- 判定 / Category
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- 標準体重 (BMI 22) / Standard weight
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How to use
- Enter your height in centimeters in "Height (cm)"
- Enter your weight in kilograms in "Weight (kg)"
- BMI, category, and standard weight are calculated automatically as you type
BMI is calculated as weight(kg) ÷ height(m)². The category follows the Japan Society for the Study of Obesity (JASSO) standard (Normal: 18.5 to under 25). Standard weight is an estimate based on a BMI of 22.
Example
Entering height 170 and weight 65 shows a BMI of 22.5, category "Normal", and a standard weight of about 63.6 kg.
FAQ
Which classification standard is used?
The JASSO (Japan Society for the Study of Obesity) standard: Underweight under 18.5, Normal 18.5 to under 25, and Obese Class 1–4 in 5 kg/m² increments from 25 upward.
What is "standard weight"?
An estimate based on a BMI of 22, which is statistically associated with the lowest risk of lifestyle-related diseases. Appropriate weight varies by individual body composition and muscle mass.
Can this be used for children or during pregnancy?
BMI is an adult-oriented metric. It does not apply to growing children or pregnant individuals — please consult a doctor or specialist.
Is my data stored anywhere?
No. Everything runs in your browser and disappears when you reload the page.
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