Health
BMI calculator
Calculate body mass index from height and weight for adults aged 18+.
Your numbers
Both a decimal point and a comma work.
Result
22.857143
Body mass index
18.5 to below 25 — standard healthy weight range.
How it works
BMI = kg / (m × m)
Using the calculator
Enter: Age in completed years (18+) · Body weight · Body height. Calculation: BMI = kg / (m × m).
Worked input and result
Example: Age in completed years (18+) = 30; Body weight = 80 kg; Body height = 180 cm. Result: Body mass index = 24.691358.
Understanding the result
BMI = weight in kg / height in metres². Shows general adult ranges. This is a screening estimate, not a diagnosis; it does not capture body composition or individual risk differences. Not intended for pregnancy or children.
BMI is a screening indicator calculated from weight and height, not a diagnosis or an individual body-composition assessment. This tool uses the adult formula and does not interpret BMI for children.