BMI Calculator
Calculate body mass index from your height and weight in centimetres and kilograms, or feet, inches, and pounds, and see the standard range it falls in and the weight range that is healthy for your height. It is a screening figure, not a diagnosis.
Enter your height and weight to see your BMI.
Underweight
Below 18.5
Healthy weight
18.5 to 24.9
Overweight
25 to 29.9
Obesity
30 and above
On this device
No signup. Your input is never uploaded.
How to use the BMI Calculator
Pick the unit for your height and enter it. For feet and inches, fill in both boxes.
Pick the unit for your weight and enter it.
Read your BMI and the range it falls in, and the healthy weight range for your height.
Questions about the BMI Calculator
Divide your weight in kilograms by your height in metres, squared. A person who is 1.75 m tall and weighs 70 kg has a BMI of 22.9. The calculator does this for you in kilograms, pounds, or stone, and in centimetres, metres, inches, or feet and inches.
The World Health Organization groups adult BMI as underweight below 18.5, healthy from 18.5 to 24.9, overweight from 25 to 29.9, and obesity from 30.
No. BMI is a rough screening number. It does not account for muscle, bone, age, or where weight is carried. For advice about your health, speak to a doctor or dietitian.