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BMI計算

身長と体重からBMIを算出します(メートル法・ヤードポンド法対応)。

Enter your height and weight.

What is BMI Calculator?

BMI Calculator computes your Body Mass Index from your height and weight using either metric (kg/cm) or imperial (lb/in) units. BMI is a simple screening tool used by health professionals to classify weight categories.

BMI categories

  • Under 18.5 EUnderweight
  • 18.5  E24.9 ENormal weight
  • 25.0  E29.9 EOverweight
  • 30.0 and above EObese

Notes

  • BMI does not directly measure body fat. Athletes and muscular individuals may have a high BMI despite low body fat.
  • BMI thresholds may differ by age, sex, and ethnicity. Consult a healthcare professional for personalized assessment.
  • This tool is for informational purposes only and is not a substitute for medical advice.

FAQ

What is the BMI formula?
Metric: BMI = weight (kg) / height (m)². Imperial: BMI = 703 ÁEweight (lb) / height (in)².
Is BMI accurate for children?
No. For children and teens, BMI is age- and sex-specific and interpreted using growth percentile charts, not the adult cutoff values.
Why is my BMI high even though I exercise?
BMI does not distinguish between muscle and fat mass. Highly muscular individuals often have an "overweight" or "obese" BMI while having healthy or low body fat percentages.

概要

身長と体重からBMIを算出します。健康管理の簡易指標として有用ですが、診断目的ではありません。

使い方

  1. 身長と体重を入力します。
  2. BMI計算を実行します。
  3. 数値とカテゴリを確認します。

使用例

補足

よくある質問

BMIだけで健康判断できますか?
できません。ほかの指標と合わせて評価してください。
筋トレしていると不正確なのはなぜ?
BMIは脂肪と筋肉を区別しないためです。
小数入力は可能ですか?
可能です。

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