BMI Calculator
Calculate your Body Mass Index and see which category it falls in.
Your BMI
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Category
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Healthy weight range
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BMI Prime
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Results update as you type.
About this calculator
Body Mass Index (BMI) is a simple ratio of weight to height used as a general indicator of whether your weight is in a healthy range. Switch between metric and imperial units. BMI is a screening tool, not a diagnosis.
Frequently asked questions
What is a healthy BMI?
A BMI between 18.5 and 24.9 is generally considered healthy. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is in the obese range.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so it can misclassify athletes and does not account for age, sex or body composition. Treat it as a rough guide.
Results are estimates for general guidance only, not financial, medical or tax advice.