BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports both imperial and metric units. Free, private, and accurate.
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25.1
Overweight
UnderweightNormalOverweightObese
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Understanding Your BMI
Body Mass Index (BMI) is a simple calculation using your height and weight. While it is not a diagnostic of body fatness or health, it is a useful screening tool to identify possible weight problems. The formula was developed by Belgian mathematician Adolphe Quetelet in the 1830s and is now used worldwide by health organizations.
| BMI Range | Weight Status |
|---|---|
| Below 18.5 | Underweight |
| 18.5 — 24.9 | Normal weight |
| 25.0 — 29.9 | Overweight |
| 30.0 and above | Obese |
Frequently Asked Questions
BMI (Body Mass Index) is a screening tool used to estimate body fat and categorize weight status. It is calculated as weight in kilograms divided by height in meters squared (kg/m²). For imperial units, the formula is 703 × weight(lbs) / height(in)².
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