BMI Calculator
Work out your Body Mass Index instantly in metric or US units, see exactly which category you land in, and find the healthy weight range for your height.
Your measurements
years
cm
ft
in
kg
lbs
Your Body Mass Index
--kg/m²
--
Healthy weight range--
Difference--
BMI Prime--
Ponderal index--
Classification (WHO, adults)
| Category | BMI range |
|---|---|
| Severe thinness | under 16 |
| Moderate thinness | 16 – 17 |
| Mild thinness | 17 – 18.5 |
| Normal weight | 18.5 – 25 |
| Overweight | 25 – 30 |
| Obesity class I | 30 – 35 |
| Obesity class II | 35 – 40 |
| Obesity class III | 40 and above |
How BMI is calculated
BMI = weight (kg) / height (m)²
BMI = 703 × weight (lb) / height (in)²
BMI = 703 × weight (lb) / height (in)²
…
What the number means
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Where BMI falls short
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This tool is for general information and fitness planning only and is not a medical diagnosis. Speak to a qualified health professional before making significant changes to your diet, training or medication.
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