BMI Calculator
Calculate your Body Mass Index to understand your weight status
Calculate Your BMI
cm
kg
Your BMI Result
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-
Enter your details to calculate your BMI
Underweight
< 18.5
< 18.5
Normal
18.5 - 24.9
18.5 - 24.9
Overweight
25 - 29.9
25 - 29.9
Obese
30+
30+
What is BMI?
Definition
Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. BMI is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity.
Importance
BMI is a useful measurement for most people over 18 years old. It can help determine whether you have a healthy weight for your height. However, it's only one factor in assessing health risks.
Limitations
BMI doesn't account for muscle mass, bone density, overall body composition, and racial and sex differences. Athletes with high muscle mass may have a high BMI but not have excess body fat.
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | Increased risk |
| Normal weight | 18.5 - 24.9 | Lowest risk |
| Overweight | 25 - 29.9 | Increased risk |
| Obesity Class I | 30 - 34.9 | High risk |
| Obesity Class II | 35 - 39.9 | Very high risk |
| Obesity Class III | 40 and above | Extremely high risk |