Using metric units for adult BMI
BMI divides weight in kilograms by the square of height in metres. Enter centimetres in this form; it converts them before calculating. For 70 kg and 175 cm, the BMI is approximately 22.86.
BMI alone does not measure fat mass or distinguish fat from muscle. This calculator is an adult screening tool. It does not calculate children’s growth percentiles or interpret an individual clinical history.
What is this calculator?
Calculate adult body mass index from weight in kilograms and height in centimetres.
What can you use it for?
Use it to understand the numerical relationship between the measurements or dates entered. Calculate adult body mass index from weight in kilograms and height in centimetres.
How to use it
- Enter weight (kg).
- Enter height (cm).
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
Height is converted to metres before it is squared. This is a screening measure, not a diagnosis.
Worked example
Weight (kg): 70, Height (cm): 175. The result is 22.85714286 (body mass index (kg/m²)).
Assumptions and limits
This is a mathematical estimate, not a diagnosis or a personalized treatment plan. Use appropriate measurements and discuss clinical decisions with a qualified professional.
Frequently asked questions
Which units should I enter?
Enter weight in kilograms and height in centimetres. Height is converted to metres before BMI is calculated.
Can BMI diagnose a health condition?
No. BMI is a screening ratio and cannot measure body composition or diagnose disease. This adult tool is not a child growth percentile calculator.
What inputs does the BMI Calculator need?
Use weight (kg), height (cm). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the BMI Calculator?
This is a mathematical estimate, not a diagnosis or a personalized treatment plan. Use appropriate measurements and discuss clinical decisions with a qualified professional.