BMI calculator
Work out your body mass index in metric or imperial units and see which weight range it falls in, using NHS adult ranges.
What BMI ranges mean
| BMI | Most adults | Lower threshold groups |
|---|---|---|
| Under 18.5 | Underweight | Underweight |
| 18.5 to 24.9 | Healthy weight | Healthy up to 22.9 |
| 25 to 29.9 | Overweight | Overweight from 23 |
| 30 or more | Obese | Obese from 27.5 |
BMI doesn't measure body fat directly, so it can overestimate for very muscular people and isn't suitable for children, pregnant women or older adults without professional advice.
This calculator gives general estimates only and isn't medical advice. Speak to your GP or a registered dietitian about your own needs.