BMI Calculator
Calculate your Body Mass Index (BMI) instantly. BMI is a simple measure that helps you understand if your weight is healthy for your height.
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obese | 30 and above |
BMI (Body Mass Index) is a numerical value calculated from your weight and height. It's used as a screening tool to categorize whether a person has a healthy weight for their height. BMI = weight (kg) ÷ height² (m²).
BMI is a general screening tool and doesn't work perfectly for everyone. It may overestimate body fat in athletes and muscular people, and underestimate it in older adults. It's best used alongside other health assessments.
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is obese.
No, this calculator is for adults (20 years and older). Children and teenagers use BMI-for-age percentiles, which are different from adult BMI categories.
No. BMI is calculated the same way for both men and women. However, women naturally tend to have more body fat than men at the same BMI.
No. All calculations happen in your browser. Your weight, height, and BMI are never sent to any server.
Yes, 100% free with no signup, no limits, and no hidden fees.