BMI (Body Mass Index) is calculated by dividing weight (kg) by height (m) squared. It's an international standard for measuring obesity. For Asians, normal BMI is 18.5-22.9, overweight is 23+, and obese is 25+.
Example: Height 170cm, Weight 65kg → BMI = 65 ÷ (1.7)² = 22.5 (Normal)
| BMI範囲 | カテゴリー |
|---|---|
| 18.5 below | 低体重 |
| 18.5 - 22.9 | 標準 |
| 23 - 24.9 | 過体重 |
| 25 - 29.9 | 肥満 |
| 30 above | 高度肥満 |
* Asian standard (WHO Asia-Pacific criteria)
24.2
✨ 過体重Height 170cm, Weight 70kg
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BMI（体格指数）は、身長と体重を使用して健康状態を評価する指標です。体重（kg）を身長（m）の2乗で割って計算されます。
BMI = 体重（kg）÷ 身長（m）²。例えば、体重70kg、身長175cmの人のBMIは70 ÷ 1.75² = 22.9です。
Useful for various situations
Check your obesity level and set a target weight.
Track BMI regularly to monitor your exercise progress.
Check and manage your BMI before health checkups.
Monitor your teen's growth-stage weight status.
Don't judge health by BMI alone. Athletes with high muscle mass can be healthy despite high BMI. Normal BMI with high visceral fat means 'skinny fat'. Measure waist circumference and body fat percentage together for accurate health assessment. Waist over 90cm (men) or 85cm (women) indicates abdominal obesity.
— Korean Society for the Study of Obesity
Use BMI 22 as a reference. For example, at 170cm height, ideal weight is about 63.6kg (1.7 × 1.7 × 22). Normal range (BMI 18.5-22.9) is 53.5-66.2kg.
💡 Our calculator automatically shows your ideal weight range!
For Asians, BMI 23+ is classified as overweight. This differs from Western standards (25+). Asians tend to have more visceral fat at the same BMI, so stricter criteria apply.
💡 Asian standards are more accurate for Korean users!
Yes! BMI only considers weight, so high muscle mass can show high BMI even without obesity. Body fat percentage measurement (InBody) is more accurate. Standard is 15-20% for men, 20-25% for women.
💡 If you exercise regularly, we recommend body fat measurement!
Ages 2-20 use the same formula but different interpretation. Results are evaluated by percentile among same age/gender. 85-94th percentile is overweight, 95th+ is obese.
Health risks (diabetes, hypertension, cardiovascular disease) increase sharply at BMI 25+ (Obese Class I). BMI 30+ is severe obesity requiring active management. BMI below 18.5 also risks malnutrition and weakened immunity.
BMI (Body Mass Index) is calculated by dividing weight (kg) by height (m) squared. It's a simple measure of obesity developed by Belgian statistician Adolphe Quetelet in the 1830s. It's widely used worldwide as a quick indicator of overall health status.
| BMI Range | Classification | Health Risk |
|---|---|---|
| < 18.5 | Underweight | Malnutrition risk |
| 18.5 - 22.9 | Normal | Low |
| 23 - 24.9 | Overweight | Slightly elevated |
| 25 - 29.9 | Obese Class I | High |
| ≥ 30 | Obese Class II | Very high |
BMI doesn't account for muscle mass, body fat distribution, or bone density. Athletes may have high BMI despite being healthy. Elderly people may have normal BMI but high body fat due to muscle loss. Use BMI as a reference only and consult a healthcare professional for accurate health assessment.
金融・ローン・比率・単位変換の公開標準を使用します。
公開された基準と各国で一般的な運用慣行を参照します。
税率・手数料・上限は地域や金融機関で異なります。
結果は基準シナリオとして活用してください。最終判断前に金融機関見積と税務条件を比較してください。
通貨: JPY
単位: metric
税計算モデル: US payroll estimate
本ツールは国別プリセットによる概算です。実際の契約条件や法的上限は金融機関・地域法令により異なる場合があります。
実際の契約前に、必ず現地機関の最新条件を確認してください。