BMI calculator
Work out body mass index from height and weight in cm and kg, or feet, stone and pounds, with the standard adult ranges.
Good to know
BMI is weight in kilograms divided by height in metres squared. The standard adult ranges are: under 18.5 underweight, 18.5 to 24.9 healthy weight, 25 to 29.9 overweight, and 30 and over obese.
BMI is a rough guide for adults only. It can't tell muscle from fat, and it isn't meant for children, pregnancy or athletes. For advice about your health, see a doctor.
Healthy weight by height
| Height | Feet and inches | BMI 18.5 to 24.9 |
|---|---|---|
| 150 cm | 4 ft 11 in | 41.6 – 56 kg |
| 155 cm | 5 ft 1 in | 44.4 – 59.8 kg |
| 160 cm | 5 ft 3 in | 47.4 – 63.7 kg |
| 165 cm | 5 ft 5 in | 50.4 – 67.8 kg |
| 170 cm | 5 ft 7 in | 53.5 – 72 kg |
| 175 cm | 5 ft 9 in | 56.7 – 76.3 kg |
| 180 cm | 5 ft 11 in | 59.9 – 80.7 kg |
| 185 cm | 6 ft 1 in | 63.3 – 85.2 kg |
| 190 cm | 6 ft 3 in | 66.8 – 89.9 kg |
| 195 cm | 6 ft 5 in | 70.3 – 94.7 kg |
Adult healthy weight range (BMI 18.5 to 24.9), rounded to 1 decimal place.
How to use it
Pick Metric or Imperial, then type a height and a weight. Figure shows the BMI, its adult range, and the healthy weight range for that height. The page opens with 175 cm and 70 kg, a BMI of 22.9. Nothing is uploaded and there is no account.
Good for:
- A quick check of an adult weight against height
- Forms that ask for a BMI
- Working from feet, stone and pounds
- Seeing the healthy weight range for a height
Questions
How is BMI worked out?
Weight in kilograms divided by height in metres squared. With feet, stone and pounds, Figure converts to metres and kilograms first, so the answer is the same.
What is a healthy BMI?
For adults, 18.5 to 24.9 is the standard healthy weight range. Under 18.5 is underweight, 25 to 29.9 overweight and 30 and over obese.
Is BMI right for everyone?
No. It is a rough guide for adults and can't tell muscle from fat. It isn't meant for children, pregnancy or athletes. For advice about your health, see a doctor.