BMI Calculator
BMI History
BMI Classification
| Category | BMI Range (kg/m²) |
|---|---|
| Severe Thinness | < 16 |
| Moderate Thinness | 16 - 17 |
| Mild Thinness | 17 - 18.5 |
| Normal | 18.5 - 25 |
| Overweight | 25 - 30 |
| Obese Class I | 30 - 35 |
| Obese Class II | 35 - 40 |
| Obese Class III | > 40 |
About BMI
What is BMI?
Body Mass Index (BMI) is a simple calculation used to assess whether a person has a healthy body weight for their height. It is calculated by dividing an individual's weight in kilograms by the square of their height in meters (kg/m²). BMI provides a general indication of whether a person is underweight, normal weight, overweight, or obese.
Importance of BMI:
BMI is an important tool for understanding health risks associated with body weight. It helps individuals and healthcare professionals identify potential weight-related health issues. A BMI within the normal range (18.5–24.9) is generally associated with better overall health, while being underweight or overweight can increase the risk of various health problems.
Health Implications:
- Underweight (BMI < 18.5): Being underweight may indicate malnutrition, an eating disorder, or other health issues. It can lead to a weakened immune system, fatigue, and fertility problems.
- Normal Weight (BMI 18.5–24.9): This range is associated with the lowest risk of weight-related health issues, such as heart disease, diabetes, and hypertension.
- Overweight (BMI 25–29.9): Being overweight increases the risk of conditions like type 2 diabetes, high blood pressure, and cardiovascular diseases.
- Obese (BMI ≥ 30): Obesity is linked to serious health conditions, including heart disease, stroke, certain cancers, and sleep apnea. The risk increases with higher BMI levels (Obese Class I, II, and III).
Limitations of BMI:
While BMI is a useful screening tool, it has limitations. It does not account for muscle mass, bone density, or overall body composition. For example, athletes with high muscle mass may have a high BMI but not be overweight. Similarly, older adults may have a normal BMI but carry excess fat. Therefore, BMI should be used alongside other health assessments, such as waist circumference, diet, and physical activity levels.
Maintaining a Healthy BMI:
To maintain a healthy BMI, focus on a balanced diet rich in fruits, vegetables, whole grains, and lean proteins. Regular physical activity, such as 150 minutes of moderate exercise per week, can help manage weight. If your BMI is outside the normal range, consult a healthcare professional for personalized advice on achieving a healthy weight.