Health
BMI Calculator
Calculate body mass index from height and weight.
Tip: BMI is a screening number, not a diagnosis. Muscle mass, age and medical context matter.
What is this calculator for?
BMI, or body mass index, is a screening measure that compares weight with height. The formula is BMI = weight in kilograms divided by height in meters squared. It is commonly used to group adults into underweight, normal, overweight and obesity ranges. BMI is quick and useful for population-level comparisons, but it does not measure body fat directly and can misclassify athletes, older adults or people with unusual body composition. Use it as a starting point, not as medical advice.
Use the calculator
Enter your numbers below — the calculator runs entirely in your browser, in English, with no signup.
How to use it
- Enter your height.
- Enter your weight.
- Read the BMI value and category.
- Use the result as a general screening estimate.
Questions and answers
Is BMI accurate for everyone?
No. BMI does not directly measure body fat and can be less useful for athletes, children, pregnant people or older adults.
What is the BMI formula?
BMI = weight in kilograms / height in meters squared.
Why only this English page?
This English page is part of the curated i18n rollout. The calculator engine is shared with the Albanian version to keep formulas consistent.