February 15th, 2012, 07:01 AM
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Mega Super Mommy
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Join Date: Sep 2009
Location: Fargo, ND
Posts: 1,328
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Your boy will likely be 5 ft. 5 in. at age 18.
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Young men often continue to grow a little past 18 until they reach 21, but their height at age 18 is very close to their final adult height. This prediction is a "best guess" but it's still just that -- a guess. Based on the formula we used* there is a 50 percent chance that your boy's full-grown height will be within 0.8 inches (above or below) of this prediction, and a 90 percent chance that it will be within 2.1 inches.
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