⚖️ BMI calculator for adults
Body mass index from your weight and height, in kilograms and centimetres or pounds, feet and inches.
Fill in weight, height and age.
For information only. It is not medical advice.
Questions and answers
Frequently asked questions
How is BMI calculated?
Weight in kilograms divided by height in metres squared. 70 kg at 1.75 m gives a BMI of about 22.9.
What is a healthy BMI?
For adults, 18.5 to 24.9 is considered the healthy range, 25 to 29.9 overweight and 30 or more obesity.
Why not for children?
Children are still growing, so their BMI is compared with charts for their age and sex. A doctor or school nurse can do that properly.
Is BMI the whole story?
No. It does not tell muscle from fat and is only a screening number. Talk to a doctor about your health.
Explore more: age calculator, and percentage calculator.