Calculate your Body Mass Index (BMI) using height and weight. See your BMI category and healthy weight range.
Enter your height
Input your height using either feet and inches or centimeters, depending on your preferred unit system.
Enter your weight
Input your body weight in pounds or kilograms.
Select the unit system
Choose between imperial (feet, pounds) or metric (centimeters, kilograms) units for your measurements.
View your BMI category
Review your calculated BMI score and see which category it falls into: underweight, normal weight, overweight, or obese.
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Body Mass Index (BMI) is a simple screening tool that estimates body fat based on height and weight. It was developed in the 1830s by Belgian mathematician Adolphe Quetelet and is still widely used by healthcare providers as a quick assessment tool.
The formula is straightforward:
BMI = weight (kg) / height (m)ยฒBMI = (weight (lbs) ร 703) / height (in)ยฒThe World Health Organization defines four main categories:
BMI is a useful population-level metric, but it has significant limitations at the individual level:
For a more complete picture of health, consider these additional metrics: waist circumference, waist-to-hip ratio, body fat percentage (measured via DEXA scan, bioelectrical impedance, or skinfold calipers), and waist-to-height ratio. Many health professionals now use BMI as a starting point alongside other assessments rather than as a standalone diagnostic tool.