Calculate your Body Mass Index (BMI) from your height and weight in metric or imperial units, and see which weight category you fall into: underweight, normal, overweight or obese.
Choose your unit system, then enter weight in kg (metric) or pounds (imperial), and height in cm (metric) or feet & inches (imperial). BMI = weight(kg) / height(m)²; switching units converts your entries automatically.
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Body Mass Index (BMI) is a screening measure that uses your height and weight to estimate body fatness for most adults. It is a quick gauge of whether your weight is in a healthy range, though it does not distinguish muscle from fat.
The standard adult categories are: underweight (< 18.5), normal (18.5–24.9), overweight (25–29.9) and obese (30+).
No. BMI does not separate muscle from fat, so very muscular people can be classed as overweight. It is also less reliable for older adults, children and pregnant women. Use it as a quick screening tool, not a diagnosis.
For most adults, a BMI between 18.5 and 24.9 is considered a healthy range. Always discuss your individual situation with a healthcare professional.