How to Use
- 1
Select your unit system - imperial (feet/inches and pounds) or metric (centimeters and kilograms).
- 2
Enter your height and weight in the corresponding fields.
- 3
Your BMI is calculated instantly and displayed alongside your weight category (underweight, normal, overweight, or obese).
Frequently Asked Questions
What is a healthy BMI range? ▼
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is considered obese. These ranges apply to adults aged 18 and over and are the same for both men and women.
Does BMI apply to athletes? ▼
BMI may overestimate body fat in athletes and muscular individuals because muscle weighs more than fat. A heavily muscled person may have a high BMI while being very lean. It is best used as a general population screening tool, not a definitive individual health measure.
Does BMI work the same for men and women? ▼
The same BMI scale applies to adult men and women, though body composition naturally differs between sexes. Women typically carry a higher body fat percentage at the same BMI as men. For a fuller picture of health, consider waist circumference and body fat percentage alongside your BMI result.