BMI calculator
Calculate your body mass index and see the healthy weight range for your height.
Your BMI
Healthy weight for your height (BMI 18.5 to 24.9)
Ask AI
Free, instant answers. Educational only, not medical advice.
What is BMI?
Body mass index is your weight in kilograms divided by your height in meters squared. The World Health Organization uses these adult categories:
- Below 18.5: underweight
- 18.5 to 24.9: healthy weight
- 25 to 29.9: overweight
- 30 and above: obesity
Limits of BMI
BMI does not tell muscle from fat, so muscular people can score as overweight. It also does not show where fat is stored. Waist size and body composition give extra context. BMI categories for children and teens use age-specific charts and are not covered here.
More calculators
Results are estimates for healthy adults and are not medical advice. Talk to a doctor or registered dietitian before major diet changes, or if you are pregnant, under 18 or managing a health condition.