BMI Calculator FAQ

BMI stands for Body Mass Index. It is a calculation that uses height and weight to place an adult result into a general weight category. Read more about what BMI is and why it can be useful as a screening tool, but not a diagnosis.

No. BMI does not directly measure body fat, muscle mass, bone density, or overall health. It is a simple estimate based on height and weight.

BMI can be less useful for athletes, very muscular people, older adults, pregnant people, children, teenagers, and some other groups. Individual context matters.

The BMI calculator on the homepage uses your height and weight to estimate BMI. In metric units, BMI is weight in kilograms divided by height in meters squared. In imperial units, BMI is calculated using pounds, feet, and inches.

No. The calculator is designed to work privately in your browser. Your height, weight, and result are not stored by this website.

Yes. You can switch between Metric and Imperial units. Metric uses meters and kilograms. Imperial uses feet, inches, and pounds.

For adults, BMI categories are commonly grouped as underweight, healthy weight, overweight, and obesity. These categories are general ranges and should be read with context.

A healthy weight BMI range means the result falls within a general adult range often associated with lower health risk. It does not guarantee overall health.

A BMI outside the healthy range does not automatically mean something is wrong. It can be a useful reason to look at habits, body composition, health history, and professional guidance.

No. This website provides educational information only. It is not a substitute for professional medical advice, diagnosis, or treatment.

This calculator and content are intended for adults 18 years and older. BMI for children and teenagers is interpreted differently.

If you are concerned about your weight, health, nutrition, sleep, activity, or BMI result, a healthcare professional can help interpret your result in context.