Body Mass Index
BMI Calculator
Check Your Body Mass Index
Calculate your body mass index and find out what it means.
kg
cm
What Is BMI?
BMI (Body Mass Index) is a simple measure used to assess whether a person’s body weight is proportionate to their height. It is calculated as weight in kilograms divided by the square of height in metres. The index is quick to calculate but has significant limitations — it does not account for body composition, fat distribution, sex, age, or bone structure.
| BMI Range | Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25 – 29.9 | Overweight |
| ≥ 30 | Obese |
Frequently Asked Questions
Is BMI accurate?
BMI is a useful screening tool but has limitations — it doesn’t account for muscle mass or fat distribution.
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered normal weight.
Can I have a high BMI and still be healthy?
Yes — athletes often have high BMI due to muscle mass. Use BMI alongside other measurements for a full picture.