Calculate your Body Mass Index and get health insights. Supports both metric (kg/cm) and imperial (lbs/ft) units.
Enter your weight and height, then click Calculate BMI.
BMI (Body Mass Index) is a value derived from weight and height that provides a rough estimate of body fatness. It's calculated as weight (kg) divided by height squared (m²).
BMI is a useful screening tool but not a perfect measure of body fat or health. It doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI despite being healthy.
Generally: Underweight < 18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese ≥ 30. These thresholds may vary by ethnicity and age group.
This calculator is designed for adults (18+). Children and teenagers have different BMI-for-age charts. Consult a pediatrician for children's BMI assessment.