BMI Calculator
Calculate body mass index from height and weight and see the category.
BMI categories: under 18.5 — underweight, 18.5–24.9 — normal, 25–29.9 — overweight, 30+ — obese.
Body mass index (BMI) is a simple metric that estimates whether your weight matches your height. It's calculated as weight in kilograms divided by height in meters squared. Enter your height and weight, and the calculator shows your BMI along with its category.
WHO categories: below 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30 and above is obesity.
BMI has limitations: it doesn't distinguish between muscle and fat, so it can show "overweight" for athletes with a lot of muscle mass and underestimate risk in older adults. Treat it as a general reference rather than a diagnosis. To estimate your daily calorie needs, check the calorie calculator.