Enter values and select Calculate to see your result.
Body Mass Index
BMI is a screening measure based on the relationship between weight and height. It does not diagnose health conditions.
View formula
BMI = weight (kg) ÷ height² (m)
How to use the BMI Calculator
Estimate body mass index from weight and height in metric units with an adult screening label.
- Enter weight in kilograms.
- Enter height in centimeters.
- Calculate BMI and the screening range.
BMI Calculator formula
BMI = weight (kg) ÷ height² (m).
Worked example
Inputs: 70 kg and 175 cm produces a BMI of about 22.9.
What to expect: The calculator returns BMI to one decimal place and the standard adult range label.
How to read your result
BMI is a population screening measure; it does not diagnose health or distinguish muscle from fat.
Frequently asked questions
Is BMI a diagnosis?
No. It is a screening measure interpreted with other health information.
Does it work for children?
Children and teens require age-specific percentiles from a qualified clinician.