Learn how to calculate BMI (Body Mass Index) and maintain a healthy weight.
1. What is BMI?
BMI is an index that evaluates obesity based on weight and height. It was developed by the Belgian mathematician and statistician Adolphe Quetelet in the late 19th century.
Since BMI can be calculated with a simple formula, it is widely used and recognized by the World Health Organization (WHO) as a standard for assessing weight status.
2. How to Calculate BMI
BMI is calculated using the following formula:
BMI = Weight (kg) / (Height (m) × Height (m))
For example, if your height is 170 cm (1.70 m) and your weight is 65 kg, your BMI is:
BMI = 65 / (1.7 × 1.7) = 65 / 2.89 ≈ 22.49
So, does this value fall within the healthy range?
3. Interpretation of BMI Values
Based on WHO and Korea's Disease Control and Prevention Agency standards, BMI categories are as follows:
BMI Range | Classification
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Below 18.5 | Underweight
18.5 ~ 24.9 | Normal weight
25.0 ~ 29.9 | Overweight
30.0 and above | Obesity
4. Limitations of BMI
While BMI is a useful tool for assessing weight status, it has several limitations:
- Does not reflect muscle mass: Individuals with high muscle mass may have a higher BMI.
- Does not consider body fat percentage: It does not distinguish between fat and muscle.
- Varies by age and gender: The same BMI may indicate different health conditions depending on age and gender.
5. Conclusion
BMI is a simple indicator for evaluating weight status, but it should not be used as an absolute standard.
For a more accurate health assessment, factors such as body fat percentage, muscle mass, and lifestyle should also be considered.