BMI Calculator
Enter your height and weight (metric or imperial) to calculate your Body Mass Index and see your weight category.
Enter your height and weight to see your BMI.
About BMI
Body Mass Index (BMI) is a quick, widely used screening tool that estimates whether your weight is in a healthy range for your height. It’s used by doctors, gyms and health apps as a simple starting point. This calculator works in both metric and imperial units and tells you your category instantly.
⚕️ This tool is for general information only and is not medical advice. Talk to a healthcare professional about your individual health.
How to use it
- Choose Metric or Imperial units.
- Enter your height and weight.
- See your BMI value and category instantly.
Frequently asked questions
What is BMI?
Body Mass Index is a simple measure that uses your height and weight to estimate whether you are in a healthy weight range. BMI = weight (kg) ÷ height (m)².
What are the BMI categories?
Under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30 or above is obese (for adults).
Is BMI accurate for everyone?
BMI is a useful general guide but does not account for muscle, bone or body composition, so very muscular people may read as “overweight”. It is informational, not medical advice.
Related tools
Try the Calorie Calculator or Ideal Weight Calculator.