BMI Calculator
Calculate your Body Mass Index and understand your health status
What is BMI?
BMI (Body Mass Index) is a standard for measuring body fat and health status. The formula is: BMI = Weight(kg) ÷ Height(m)². This tool supports multiple international standards including WHO and Asian standards from China, Japan, Korea, and Singapore.
How to Use
- Select the BMI standard for your region
- Select unit system and enter your height and weight
- Click calculate to see your BMI result and health recommendations
Standards Guide
WHO International Standard
Underweight < 18.5, Normal 18.5-25, Overweight 25-30, Obese ≥ 30. The global standard by World Health Organization, suitable for Western populations.
Asian Standards
Research shows Asians may face health risks at lower BMI levels. China: Normal 18.5-24; Japan: Normal 18.5-25; Korea: Normal 18.5-23; Singapore: Normal 18.5-23. Please select the appropriate standard for your region.
FAQ
Q: Is BMI calculation accurate?
A: BMI is a simple and practical screening tool, but it has limitations. It cannot distinguish between muscle and fat, so athletes or muscular individuals may have high BMI but are actually healthy. It's recommended to combine with other indicators like body fat percentage.
Q: Which standard should I use?
A: Please select the standard corresponding to your country or region. Asian populations are recommended to use Asian standards, as research shows Asians may face higher metabolic disease risks at lower BMI levels.
Q: Can children use the BMI calculator?
A: Children and adolescents (2-20 years) should use BMI percentiles for assessment as their bodies are still developing. Consult a pediatrician for professional evaluation.
Q: Can pregnant women use the BMI calculator?
A: Weight gain during pregnancy is a normal physiological phenomenon. Regular BMI standards are not recommended for pregnant women. Pregnancy weight management should follow doctor's advice based on pre-pregnancy BMI and gestational age.