BMI by Age
Enter weight and height to calculate BMI and see the general weight category.
About this calculator
This bmi by age calculates Body Mass Index — weight divided by height squared — and maps it to the standard adult categories used by most health authorities as a population-level screening tool.
BMI doesn't distinguish muscle from fat and isn't a diagnosis; it's a starting point for a conversation with a healthcare provider, not a final judgement about health.
How it works
Enter the required details
Fill in the fields above — weight and height, or date of birth depending on the tool.
Calculate
The calculator applies the standard formula.
Read the result with context
Use the notes alongside the result — these are general reference tools, not medical diagnoses.
Frequently asked questions
Is this medical advice?
No. These calculators provide general, population-level reference information only and are not a substitute for professional medical assessment.
Why do the results include a disclaimer?
Health metrics like BMI and growth percentiles are screening tools, not diagnoses — individual factors like muscle mass, frame size, and health history matter and can't be captured by a simple formula.
Who should I talk to about my results?
A doctor, paediatrician, or registered dietitian can interpret these figures properly in the context of your overall health.