For educational and tracking purposes only. Results are estimates and are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional.
Calculator tool
How this calculator works
Use the explanation to understand the formula, assumptions, and practical limits behind the calculator result.
Two jobs in one calculator
The Height Calculator does two different things. First, it converts a measured height between centimeters, inches, and feet-plus-inches using the exact relationship 1 inch = 2.54 cm. Second, it gives a rough child adult-height estimate from parental heights using the mid-parental approach implemented in the tool.
For the child estimate, the calculator adds 12.7 cm for boys or subtracts 12.7 cm for girls before averaging the parents' heights. That estimate is useful for general planning, but it is not a diagnosis and it does not describe every child's growth path.
How to read the result
Use the conversion result when you only need units. Treat the child-height estimate as a broad family-based reference. Nutrition, chronic illness, puberty timing, measurement quality, and genetics beyond the parents' own heights can all affect adult height. If growth itself is the concern, serial measurements on a growth chart are more informative than one isolated estimate.
Frequently asked questions
Why does the calculator use 12.7 cm in the child estimate?
The implemented mid-parental formula adjusts the parental average by 12.7 cm before dividing by two: added for boys and subtracted for girls.
Is the child-height estimate exact?
No. It is a rough family-based estimate, not a medical prediction. A child can finish meaningfully above or below it because growth depends on many factors beyond parental height alone.
What measurement should I enter for my own height?
Use a current measured height, not a remembered estimate. Small unit errors become obvious when converting between centimeters and feet/inches.
When should I seek professional guidance instead of relying on the estimate?
If the concern is unusual growth, delayed puberty, or a child crossing growth-chart percentiles, use a clinician and formal growth records rather than one calculator result.
