BMI Calculator
Calculate Body Mass Index for adults, children, and teens based on weight to height ratio
Calculate Your BMI
BMI Categories & Weight Status
| BMI Range | Weight Status | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased health risks |
| 18.5 - 24.9 | Normal weight | Healthy weight range |
| 25.0 - 29.9 | Overweight | Moderate health risks |
| 30.0 and above | Obese | High health risks |
How to Calculate BMI?
For Adults (20+ years)
- Select "Adults" calculator type
- Choose your gender
- Enter your height in cm or ft/in
- Enter your weight in kg or lbs
- Click "Calculate BMI" button
BMI Formula for Adults:
BMI = Weight (kg) ÷ Height² (m²)
For Children & Teens (2-20 years)
- Select "Children & Teens" calculator type
- Choose gender and enter age
- Enter height in cm or ft/in
- Enter weight in kg or lbs
- Click "Calculate BMI" button
Note:
For children and teens, BMI is age and gender-specific and is often referred to as BMI-for-age.
Health Risks Associated with BMI
Risks of Being Overweight
- High blood pressure
- High LDL cholesterol
- Heart disease
- Type 2 diabetes
- Breathing issues
- Mental disorders
- Anxiety & Depression
- Body pain
Risks of Being Underweight
- Malnutrition
- Vitamin deficiencies
- Anemia
- Osteoporosis
- Decreased immune function
- Fertility issues
- Growth and development issues
Frequently Asked Questions
A healthy BMI range for adults is typically between 18.5 and 24.9. This range is associated with the lowest health risks.
The BMI calculation is the same for men and women. However, the interpretation may vary slightly as men typically have more muscle mass than women.
BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, so athletes or very muscular people may have a high BMI without being overweight.