BMI Chart
Body Mass Index Categories and Classifications
| BMI Category | BMI Range (kg/m²) | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | Malnutrition, osteoporosis, anemia |
| Normal weight | 18.5 – 24.9 | Lowest health risk |
| Overweight | 25 – 29.9 | Moderate risk of developing health issues |
| Obese Class I | 30 – 34.9 | High risk of health problems |
| Obese Class II | 35 – 39.9 | Very high risk of health problems |
| Obese Class III | 40 and above | Extremely high risk of health problems |
BMI Chart
Body Mass Index (BMI) is a person’s weight in kilograms divided by the square of height in meters. BMI is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity. For most adults, BMI provides a good estimate of weight-related health risks. However, it does not directly measure body fat and may not accurately reflect health in muscular individuals, athletes, or the elderly.
BMI Classification Guide
Understanding Body Mass Index categories and their impact on health. Learn about weight classifications from underweight to severe obesity.
BMI Weight Categories
Underweight Range
BMI Value: Less than 18.5 kg/m² Individuals in this category may have insufficient body fat to maintain optimal health. This can indicate potential nutritional deficiencies or underlying health conditions.
Healthy Weight Range
BMI Value: 18.5 – 24.9 kg/m² This range is associated with the lowest health risks for most individuals. Maintaining weight within this category supports overall wellness and reduces disease probability.
Overweight Classification
BMI Value: 25.0 – 29.9 kg/m² Excess body weight in this range begins to increase health risks. Modest weight reduction can significantly improve health outcomes and reduce disease likelihood.
Obesity Categories
BMI Value: 30.0 kg/m² and above This classification includes three obesity classes with progressively increasing health risks. Professional medical guidance is recommended for weight management strategies.
Health Implications by BMI Category
Different BMI ranges are associated with varying health concerns. Understanding these risks can help in making informed decisions about weight management.
Underweight Risks
Normal Weight Benefits
Optimal energy levels, balanced metabolism, cardiovascular health
Overweight Concerns
Type 2 diabetes, hypertension, joint problems
Obesity Complications
Heart disease, stroke, sleep apnea, certain cancers
BMI Calculation Formula
BMI = Weight (kg) ÷ Height (m)²
For imperial measurements: BMI = (Weight (lbs) ÷ Height (inches)²) × 703
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