Bone Age Calculator
Enter a date of birth to see chronological age — true bone age requires an X-ray reading by a clinician.
About this calculator
Bone age is a clinical measurement, not something a calculator can produce from a date alone — it's determined by a radiologist or paediatrician comparing a hand-and-wrist X-ray against standardised reference atlases.
This bone age calculator shows chronological age as a reference point so you can compare it with a bone age result from an actual radiograph.
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.