計算身體質量指數，提供即時健康評估與建議
輸入您的體重和身高，即可獲得身體質量指數和個人化健康洞察。
專業健康評估工具，適用於健身專業人士、醫療提供者與健康愛好者
產業標準 BMI 計算，提供精確健康類別評估與建議
全面健康風險評估，提供個人化建議與理想體重範圍
進度監測工具，具歷史追蹤與目標設定功能，用於健康
自動單位偵測，支援全球公制和英制測量
即時 BMI 計算，提供即時健康洞察和可行動建議
所有健康計算均在本地進行，提供完整隱私和資料安全保護
常見問題
BMI (Body Mass Index) is weight in kilograms divided by height in meters squared. A BMI of 18.5-24.9 is considered normal weight. It's a quick screening tool, not a diagnostic — it doesn't distinguish between muscle and fat mass.
Underweight: below 18.5. Normal: 18.5-24.9. Overweight: 25-29.9. Obese: 30 and above. These ranges were established by the WHO and apply to adults over 20. Children and teens use age-specific BMI percentiles instead.
Use BMI as a starting point, not a verdict. Track it over time alongside other metrics like waist-to-hip ratio and blood pressure. Consult a healthcare provider for personalized advice — BMI alone doesn't determine health status.
BMI doesn't account for muscle mass, bone density, age, sex, or fat distribution. Athletes often have high BMI despite low body fat. Waist circumference and body fat percentage provide additional context for health assessment.
No. Children's BMI is interpreted using age- and sex-specific percentile charts because body composition changes significantly during growth. A child's BMI is compared against others of the same age and sex, not fixed adult ranges.
Yes. Research shows that health risks can differ across ethnic groups at the same BMI. For example, some Asian populations may have higher health risks at lower BMI values. WHO suggests adjusted thresholds for certain populations.
Yes. All calculations run locally in your browser. Your weight, height, and BMI results are never sent to any server or stored anywhere. Close the tab and all data is gone.