Your Body Mass Index (BMI) is a quick, widely used screening number that estimates whether your weight is in a healthy range for your height. It is easy to calculate and a useful starting point for thinking about your health. Here is what BMI means, how to calculate it, and how to read your result.
What is BMI and how is it calculated?
BMI is your weight divided by the square of your height. In metric terms it is kilograms divided by metres squared. The standard categories are: under 18.5 (underweight), 18.5–24.9 (healthy weight), 25–29.9 (overweight) and 30 or above (obese). You do not need to do the maths by hand — a calculator does it instantly.
Calculate your BMI instantly
The free BMI Calculator on apps2help.com supports both metric and imperial units. Enter your height and weight to see your BMI, your category on a visual gauge, and your ideal healthy weight range — all calculated privately in your browser.
- Open the BMI Calculator.
- Choose metric or imperial units and enter your height and weight.
- Read your BMI, your category, and your ideal weight range.
Understanding the limits of BMI
BMI is a helpful general guide, but it is not a complete picture of health. It does not distinguish muscle from fat, so very muscular people may read as overweight, and it does not account for age, sex or fat distribution. Treat BMI as one signal among many, and consult a healthcare professional for personalised advice.
Frequently asked questions
What is a healthy BMI? Generally 18.5 to 24.9, though individual factors matter.
Does the tool support imperial units? Yes — both metric and imperial.
Is my data private? Yes, everything is calculated in your browser. See our Privacy Policy.
This information is for general educational purposes and is not medical advice.
Check yours: use the free BMI Calculator now.