Health
BMI Calculator
Calculate your body mass index (BMI) from height and weight, in metric or imperial units, and see your weight category.
BMI categories
- Below 18.5 — Underweight
- 18.5 to 24.9 — Normal weight
- 25 to 29.9 — Overweight
- 30 and above — Obese
What BMI does and doesn’t tell you
BMI compares weight to height and nothing else. A muscular athlete and someone carrying excess fat can share the same BMI, and it reads differently across ages and ethnic groups. Treat it as one rough signal among several, not a verdict on your health.
BMI doesn’t account for muscle mass, bone density, or body composition. It’s a general screening tool, not a diagnosis.