BMI calculator
Estimate your Body Mass Index and see the standard category.
Your BMI
22.9
Normal weight
An estimate, not medical advice. Runs entirely in your browser.
How to use this tool
- Choose metric or US units.
- Enter your height and weight.
- Click Calculate to see your BMI and category.
The formula
metric: BMI = kg / (meters x meters)
US: BMI = 703 x pounds / (inches x inches)
How to read the categories
Standard ranges are: under 18.5 underweight, 18.5 to 24.9 normal, 25 to 29.9 overweight, and 30 or more obese. BMI is a rough screen, not a diagnosis. It does not account for muscle, build, or age, so athletes and others can read high while being healthy.
Common questions
Is BMI accurate for everyone?
No. It is a population-level screen. For a personal assessment, talk to a healthcare professional who can consider the full picture.