新着

BMI計算機

身長と体重からBMI（体格指数）を計算します。メートル法とヤード・ポンド法に対応し、カテゴリーを即座に表示します。

身長をセンチメートル、体重をキログラムで入力してください

あなたのBMI
身長と体重を入力して計算
BMIはスクリーニングツールであり、診断基準ではありません。筋肉量、骨密度、体組成は考慮されません。個別のアドバイスは医療専門家にご相談ください。

How to Use This Tool

  1. 1

    Select your unit system

    Choose between Metric (cm/kg) or Imperial (ft, in/lbs) depending on your preference.

  2. 2

    Enter your height

    Input your height in centimeters for metric, or feet and inches for imperial measurement.

  3. 3

    Enter your weight

    Type your weight in kilograms (metric) or pounds (imperial) into the weight field.

  4. 4

    Read your BMI result

    Your Body Mass Index is calculated instantly and displayed with a color-coded category: underweight, normal, overweight, or obese.

Frequently Asked Questions

What is BMI and how is it calculated?
BMI (Body Mass Index) is a measure of body fat based on height and weight. The metric formula is weight (kg) ÷ height (m)². The imperial formula is (weight (lbs) × 703) ÷ height (in)².
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is generally considered normal weight. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is classified as obese by the WHO.
Is BMI accurate for athletes or muscular people?
BMI does not distinguish between muscle and fat mass. Athletes with high muscle mass may have a high BMI but low body fat. Consider additional metrics like body fat percentage for a more complete picture.
Can I use this BMI calculator for children?
This calculator uses adult BMI categories. Pediatric BMI is assessed using age- and sex-specific percentile charts, which require a different tool.