ScanSpotBMI Calculator
Check your BMI and healthy range.
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⚖️ BMI Calculator
Body mass index, category, and healthy weight range.
Calculate body mass index from height and weight, with the healthy weight range for your height and the standard category boundaries.
How to use the BMI Calculator
- Enter your height and weight, in metric or imperial.
- The BMI value and its category are shown straight away.
- The healthy weight range for your height is listed underneath.
Why people use it
- The healthy range is more actionable than the single index number.
- Metric and imperial inputs both work, with no manual conversion.
- Category boundaries follow the World Health Organization definitions.
Frequently asked questions
What are the BMI categories?
Under 18.5 is underweight, 18.5 to 24.9 is the healthy range, 25 to 29.9 is overweight, and 30 or above is obese. Those boundaries apply to adults; children are assessed on age-specific growth charts.
Does BMI work for athletes and muscular people?
No. BMI only compares weight to height and cannot distinguish muscle from fat, so muscular people are frequently classified as overweight.
Is BMI a diagnosis?
No. It is a population-level screening measure. Body composition, waist circumference and overall health all carry more information for an individual.