BMI is a quick weight-to-height ratio used as a first screening tool.
Example: The same BMI can mean different health risk depending on muscle mass, age, and waist size.
| 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。
どんな人に向いているかを先に確認できます。
Useful when you want numbers around waist size and body-fat context.
Helpful when you need to compare your current setup against a realistic alternative.
Good when sustainability matters more than the headline number.
Start here when you want a numeric baseline before taking action.
具体例で使いどころをすぐ判断できます。
Run a realistic baseline first
Result
See the first decision threshold quickly
A rough baseline is better than guessing.
Change one major variable
Result
Watch how decision quality changes
Structure often matters more than the headline number.
Use a more conservative assumption
Result
Stress-test the plan before committing
Conservative assumptions usually create better real-world plans.
X vs Y、いくらまで可能か、いつ有利かを整理します。
Best for
When two choices look similar on the surface
Watch for
The hidden structure often matters more than the headline number.
Decision rule
Cash flow and sustainability usually matter more than optics.
Best for
When approved amount and healthy amount are not the same
Watch for
Maximum eligibility is rarely the same as safe capacity.
Decision rule
Set the monthly burden you can carry first, then build around it.
Best for
When timing or conditions change the answer
Watch for
Delay can become more expensive than expected.
Decision rule
Prepared structure and consistency usually beat perfect timing.
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
Start with the assumption that changes the result most. This tool is most useful for setting a decision baseline, not pretending the first number is perfect.
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。