Practical tools for measured work
Mid-parental adult-height reference
Calculate the AAP mid-parental height reference and broad target interval from both biological parents’ measured heights.
How it works
The AAP inch method averages parental heights after adding 5 inches for the boy model or subtracting 5 inches for the girl model. The broad target interval is ±4 inches. This tool converts that same inch convention to centimetres.
Before using the result
- Check the selected mode, units and input values before using the result.
- Read the assumptions and rounding rules; compare the worked example with your intended calculation.
- A numerical result does not supply missing context or change the stated limitations.
Limitations
For a child under 18 with both biological-parent measurements. This is a population reference, not an individual forecast or a growth diagnosis. It does not use bone age, puberty timing, growth velocity or medical history. The interval does not guarantee an individual outcome.
Frequently asked questions
What should I verify before using this result?
Check the input values, units, dates and assumptions. Compare the method and its stated limits with the source relevant to your task.
Why might the finished result differ?
Results depend on the entered data and the model’s assumptions. Rounding, changing conditions or omitted factors can affect the comparison. Read the limitations before using the result.
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