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Health & FitnessGenerated accuracy model review: 2026-05-06
Child Height Predictor accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- The formula averages the parents' heights and adds (for boys) or subtracts (for girls) 2.5 inches (6.35 cm). * **Boys:** (Dad + Mom + 5 inches) / 2 * **Girls:** (Dad + Mom - 5 inches) / 2
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Child Gender: Boy
- Father Height (ft): 5
- Father Height (in): 10
- Mother Height (ft): 5
- Mother Height (in): 4
Expected outputs
- Predicted Height: 5' 10"
- Likely Range (+/- 2"): 5' 8" - 5' 12"
Known limitations
- Does not account for outliers or 'regression to the mean' (very tall parents often have slightly shorter children, and vice versa).
Assumptions
- The estimate uses the mid-parental-height method, which centers strongly on genetics.
- It assumes a generally healthy growth environment without significant medical or hormonal disruption.
- This is a broad range estimate and cannot predict exact adult height.
Unit handling
- Child Gender accepts one of the configured options.
- Father Height (ft) accepts numeric values.
- Father Height (in) accepts numeric values.
- Mother Height (ft) accepts numeric values.
- Mother Height (in) accepts numeric values.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current child-height-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Child Height Predictor.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.