BMI & Body Fat Calculator
Free online BMI (Body Mass Index) and body fat percentage calculator to help you understand your health status and get professional advice.
📊 BMI & Body Fat Calculator
📈 計算結果
請輸入身高、體重、年齡和性別後點擊計算
📖 Usage Instructions
Select unit system (Metric or Imperial)
Select gender
Enter height, weight, and age
Click calculate button to view results
❓ Frequently Asked Questions
Q: What is BMI?
A: BMI (Body Mass Index) is a measure of body weight relative to height, calculated as: weight (kg) ÷ height (m)².
Q: What is the normal BMI range?
A: According to WHO standards, the normal BMI range is 18.5-24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
Q: How is body fat percentage calculated?
A: This tool uses the Deurenberg formula to estimate body fat percentage based on BMI, age, and gender. For more accurate measurements, professional equipment is recommended.
Q: Is BMI applicable to everyone?
A: BMI is primarily for general adults. For special groups like athletes, pregnant women, and the elderly, other assessment methods may be needed.
Q: How is ideal weight range calculated?
A: The ideal weight range is calculated based on the normal BMI range (18.5-24.9), providing a healthy weight reference interval.