Health
BMI Calculator
Calculate your Body Mass Index (BMI) and get health recommendations.
What BMI is (and is not)
Body mass index (BMI) is a quick screening number based on your height and weight. It is widely used in public health because it is easy to compute, but it does not measure body fat directly and can misclassify very muscular or older adults. Think of the output as a starting signal to discuss trends with a qualified clinician rather than a diagnosis.
Use the tool
How to use this page responsibly
Enter the units your region expects (for example, metric vs. imperial) and use recent measurements, not a remembered value from long ago. If you are comparing your number over time, try to use the same scale and similar time of day for consistency. If you feel unwell, focus on how you feel and professional guidance, not a single number.
Privacy and limitations
BMI is one input among many, including activity, diet, medical history, and lab values. The calculations here run in your browser on SimpleWebToolsBox and are not medical advice, diagnosis, or treatment.