Enter your Unit System (imperial or metric), Weight, and Height to calculate your BMI Value and see which BMI Category you fall into — plus your personal Healthy Weight Range so you know exactly where you stand.
BMI Value
--
BMI Category
--
Healthy Weight Range (Min)
--
Healthy Weight Range (Max)
--
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated by dividing weight in kilograms by height in meters squared (kg/m²). For imperial units, the formula is (weight in pounds × 703) ÷ (height in inches)².
BMI categories are: Underweight (below 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (30 and above). These categories help assess health risks associated with weight.
BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, so athletes or very muscular individuals may have high BMIs despite being healthy. It's also less accurate for older adults, children, and certain ethnic groups.
If your BMI suggests you're overweight or obese, consult with a healthcare professional for personalized advice. They can assess your overall health and recommend appropriate lifestyle changes including diet modifications and exercise routines.
For adults, checking BMI monthly or quarterly is usually sufficient unless you're actively trying to lose or gain weight. Regular monitoring can help track progress toward health goals and identify trends over time.
BMI calculations for children and teens use the same formula but are interpreted differently using age and sex-specific percentile charts. Consult a pediatrician for accurate interpretation of BMI in children under 18.
A healthy BMI range for most adults is 18.5 to 24.9. This range is associated with the lowest risk of weight-related health problems. However, optimal BMI can vary based on individual factors like age, muscle mass, and ethnicity.