BMI Calculator
Enter your height and weight to calculate your Body Mass Index.
About this calculator
BMI (Body Mass Index) is a simple screening measure calculated from height and weight. It's useful as a quick population-level indicator, but it doesn't account for muscle mass, bone density, age, or sex — an athlete with high muscle mass can show a high BMI without carrying excess body fat. Use it as a general reference point, not a diagnosis.
What are the BMI categories?
Under 18.5 is classified as underweight, 18.5–24.9 as a typical range, 25–29.9 as overweight, and 30 or above as obese, according to World Health Organization thresholds for adults.
Is BMI accurate for everyone?
No — it doesn't distinguish muscle from fat and can be misleading for athletes, older adults, and pregnant people. Talk to a doctor for a fuller picture of your health.