Is a Two-Year-Old Really Half Their Adult Height?
You can slide the numbers to match your grandchild’s current height, input the parents’ heights, and instantly see how the two formulas compare.
Even better: you can type in your grandchild’s name and download a personalised card to text or email to their parents!
It’s free. No email, no nuffin’.
Grandchild Height Forecast
Compare the 2-Year-Old Double Rule with Genetic Parental Target Math
Grandchild's Name
Child's Sex:
Display Units:
Toddler Height (Age 2)
87 cm
Mother's Height
165 cm
Father's Height
178 cm
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