BMI Calculator
Calculate your Body Mass Index and understand what it means for your health.
Under 18.5
Underweight
Underweight
18.5 - 24.9
Normal
Normal
25 - 29.9
Overweight
Overweight
30+
Obese
Obese
What is BMI?
Body Mass Index (BMI) is a simple measure using your height and weight to estimate whether you're at a healthy weight. It's calculated by dividing your weight in kilograms by your height in meters squared.
Formula: BMI = weight (kg) / height² (m²)
BMI Categories
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25 - 29.9 | Overweight |
| 30 - 34.9 | Obesity Class I |
| 35 - 39.9 | Obesity Class II |
| 40 and above | Obesity Class III |
Limitations of BMI
While BMI is a useful screening tool, it has limitations:
- Doesn't distinguish between muscle and fat mass
- May overestimate body fat in athletes
- May underestimate body fat in older persons
- Doesn't account for fat distribution
- Same thresholds used for all ethnicities, though risks vary
For a complete health assessment, consult a healthcare professional.
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