BMI Calculator
A tool to calculate your BMI (Body Mass Index) by entering height and weight.
📊 BMI Reference Table
| BMI | Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 ~ 22.9 | Normal |
| 23.0 ~ 24.9 | Overweight |
| 25.0 ~ 29.9 | Obese |
| ≥ 30.0 | Severely Obese |
💡 Notice
• BMI is for reference only and does not reflect muscle mass or body fat percentage.
• Consult a healthcare professional for accurate health status.
• This standard is based on Asian criteria.
What is BMI?
BMI (Body Mass Index) is an international standard for determining obesity using height and weight.
Calculation Formula
BMI = Weight(kg) ÷ (Height(m))²
Example: Height 170cm, Weight 65kg
- BMI = 65 ÷ (1.7)² = 65 ÷ 2.89 = 22.5
BMI Standards (Asian)
| BMI Range | Classification | Description |
|---|---|---|
| < 18.5 | Underweight | Possible malnutrition |
| 18.5 ~ 22.9 | Normal | Healthy weight |
| 23.0 ~ 24.9 | Overweight | Caution needed |
| 25.0 ~ 29.9 | Obese | Weight loss recommended |
| ≥ 30.0 | Severely Obese | Medical consultation needed |
How to Use
- Enter Height - In centimeters (e.g., 170)
- Enter Weight - In kilograms (e.g., 65)
- Click Calculate button
- Check Results - View BMI value and classification
Important Notes
Limitations of BMI
- Doesn't Account for Muscle Mass - Athletes with high muscle mass may have high BMI
- Doesn't Reflect Body Fat - Actual body fat needs separate measurement
- Age/Gender Differences - Different standards apply for children, adolescents, and pregnant women
- Individual Variations - Can vary depending on bone structure and body type
Recommendations
- Use BMI as a reference indicator only
- Consult a medical professional for accurate health assessment
- Consider body fat percentage, muscle mass, etc. comprehensively
WHO vs Asian Standards
| Classification | WHO Standards | Asian Standards |
|---|---|---|
| Normal | 18.5 ~ 24.9 | 18.5 ~ 22.9 |
| Overweight | 25.0 ~ 29.9 | 23.0 ~ 24.9 |
| Obese | ≥ 30.0 | ≥ 25.0 |
This calculator uses Asian standards.
Tips for Maintaining Healthy Weight
1. Balanced Diet
- Consume vegetables, fruits, and protein evenly
- Reduce processed foods and sugar intake
- Regular meal times
2. Regular Exercise
- 3+ times a week, 30+ minutes each
- Combine aerobic and strength training
- Take stairs, make walking a habit
3. Sufficient Sleep
- 7-8 hours of quality sleep daily
- Regular sleep patterns
- Stress management
4. Water Intake
- Drink 1.5-2 liters of water daily
- Choose water over coffee and beverages
- Drink water 30 minutes before meals
Frequently Asked Questions
Q: Does high BMI always mean obesity?
A: No. People with high muscle mass may have elevated BMI. Check body fat percentage as well.
Q: If my BMI is normal, am I healthy?
A: BMI is just one indicator. You need to consider body fat percentage, muscle mass, blood pressure, blood sugar, etc. comprehensively.
Q: What BMI is healthiest?
A: Generally, 20-22 is considered healthiest, but there are individual variations.
Q: How can I lower my BMI?
A: Healthy diet + regular exercise is most important. Avoid crash diets.
Related Tools
Coming soon:
- Body Fat Percentage Calculator
- Ideal Weight Calculator
- Calorie Calculator
References
- WHO (World Health Organization) Standards
- Korean Society for the Study of Obesity Guidelines
- Asia-Pacific Obesity Standards
Privacy
- All calculations are done in your browser
- No data is stored on our servers
- Your information remains completely private
💬 Was this tool helpful?
Feel free to send us your feedback or suggestions anytime!