BMI Calculator
Calculate your Body Mass Index (BMI) from your height and weight in either metric or imperial units. Your result is shown with the standard World Health Organization weight category.
Units
cm
kg
Enter your height and weight to find your BMI.
Frequently asked questions
How is BMI calculated?+
BMI equals your weight in kilograms divided by the square of your height in metres (kg/m²). Imperial inputs are converted automatically.
What is a healthy BMI range?+
For most adults a BMI of 18.5–24.9 is considered the healthy range. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is in the obese range.
Is BMI accurate for everyone?+
BMI is a useful general screening tool but it does not distinguish muscle from fat, so it can be misleading for athletes, pregnant people and older adults. Treat it as a guide, not a diagnosis.
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