BMI 計算器
計算您的身體質量指數並檢查您的健康狀態！
單位
身高
體重
* BMI 是一般篩檢工具，非醫療建議。如需個人化健康指導，請諮詢醫療專業人員。
BMI 計算機是什麼？
The BMI Calculator computes your Body Mass Index — a widely used screening tool that estimates body fat based on your height and weight. BMI provides a quick, accessible way to assess whether your weight falls within a healthy range, though it has important limitations. Developed by Belgian mathematician Adolphe Quetelet in the 1830s, BMI is calculated as weight (kg) divided by height squared (m²). The World Health Organization classifies BMI into categories: underweight (<18.5), normal (18.5-24.9), overweight (25-29.9), and obese (30+). This calculator accepts both metric and imperial measurements and provides your BMI with contextual health information. It also explains BMI's limitations and when other health metrics might be more appropriate.
- ✓ 依據 WHO 標準進行體重狀態分類
- ✓ 自動計算健康體重範圍與目標體重
- ✓ 支援公制（kg/cm）與英制（lb/ft）兩種單位
- ✓ Supports both metric (kg/cm) and imperial (lbs/ft) measurements
- ✓ Contextual health information with WHO classification categories
常見問題
▶什麼是 BMI？
身體質量指數（BMI）是根據身高和體重測量體脂肪的指標。計算方式是將體重（公斤）除以身高（公尺）的平方。
▶健康的 BMI 範圍是多少？
BMI 在 18.5 至 24.9 之間被視為正常體重。低於 18.5 為體重不足，25-29.9 為過重，30 以上為肥胖。
▶BMI 對每個人都準確嗎？
BMI 是一個有用的篩查工具，但不考慮肌肉量、骨密度或身體組成。運動員可能 BMI 較高但仍然健康。
▶Is BMI accurate for everyone?
No. BMI doesn't distinguish between muscle and fat mass, so muscular athletes may be classified as overweight despite being healthy. It's also less accurate for elderly people, pregnant women, and growing children. Waist circumference and body fat percentage are often better indicators.
▶What is a healthy BMI range?
The WHO defines 18.5-24.9 as the normal BMI range. However, optimal BMI can vary by ethnicity, age, and individual factors. Some Asian health organizations use lower thresholds (23 for overweight) due to different body composition patterns.
▶Should I rely solely on BMI for health assessment?
No. BMI is a useful screening tool but should be considered alongside other metrics like waist-to-hip ratio, body fat percentage, blood pressure, cholesterol levels, and overall fitness. Consult a healthcare professional for comprehensive health assessment.
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