BMI Calculator
Enter your height and weight to see your BMI, your category and the weight range for your height.
How to use it
- Choose metric or imperial units.
- Enter your height and weight.
- Read your BMI, the category and the healthy weight range for your height.
About this tool
BMI is weight in kilograms divided by height in metres squared. Categories follow the World Health Organization adult ranges: under 18.5 underweight, 18.5 to 24.9 healthy, 25 to 29.9 overweight and 30 or more in the obesity range.
BMI is a simple screening number. It does not measure body fat, muscle, age or sex, and it is not a diagnosis. Talk to a doctor or other health professional about your own health. This calculator is for adults aged 20 and over.
Frequently asked questions
Is BMI accurate for athletes?
Not always. Muscle weighs more than fat, so very muscular people can have a high BMI while being healthy.
What is a healthy BMI?
The WHO range for adults is 18.5 to 24.9.
Does it work for children?
No. Children and teens use age-based percentile charts.
Is my data saved?
No. Everything stays in your browser.