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Calculate your Body Mass Index and find out your health weight category instantly.
Select your preferred unit system — Metric (kg and cm) or Imperial (lbs and ft/in). Enter your weight and height, then click Calculate BMI. Your result will include your BMI value, category, and a visual indicator on the BMI scale.
Note: BMI is a general screening tool. It does not account for muscle mass, bone density, or body composition. Consult a healthcare professional for personalized health advice.
BMI (Body Mass Index) is a measure of body fat based on your weight and height. The formula is: BMI = weight(kg) ÷ height(m)². For imperial units, BMI = (weight(lbs) ÷ height(in)²) × 703.
BMI is a useful screening tool but has limitations. It may overestimate body fat in athletes and underestimate it in older adults. It also doesn't distinguish between muscle and fat mass.
For most adults, a BMI between 18.5 and 24.9 is considered normal/healthy. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is classified as obese.
This calculator is designed for adults (18+). For children and teens, BMI is interpreted differently using age- and sex-specific percentiles. Please use a pediatric BMI calculator for those cases.
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