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BMI Calculator
Enter height and weight in centimetres and kilograms, or feet and pounds, and see the BMI category.
How it works
- Choose cm and kg, or ft and lb.
- Enter your height and weight.
- Press Calculate.
- Read your BMI and the category it falls in.
Good to know
BMI categories (WHO, adults)
| Category | BMI |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obesity Class I | 30.0 – 34.9 |
| Obesity Class II | 35.0 – 39.9 |
| Obesity Class III | 40.0 and above |
- BMI does not differentiate between muscle mass and adipose tissue (fat mass), nor account for age-related bone density loss.
- The categories are for adults aged 18 and over. For children and teenagers, ask a doctor or nurse.
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Questions
- How is BMI worked out?
- Your weight in kilograms divided by your height in metres, squared.
- Is BMI a diagnosis?
- No. It is a quick screening number. A health professional can give you a fuller picture.