Baby Height Predictor
Curious how tall your little one might grow? Enter both parents’ heights and your baby’s sex to see a playful adult-height estimate using the well-known mid-parental height method, with a typical range around it.
Just for fun, not a medical prediction. Adult height depends on much more than genetics — your provider can track your child’s real growth over time.
How it works
The mid-parental method averages the two parents’ heights and adjusts for sex — adding about 6.5 cm for boys and subtracting it for girls. Most children land within roughly 8–9 cm either side of that estimate, which is why we show a range, not a single number.
Genetics is a big influence on adult height, but it’s far from the whole story — nutrition, health and growth patterns all play a part. Treat this as a bit of fun, not a forecast, and let your provider track your child’s actual growth curve.
How this is calculated
This uses the mid-parental height method: average the parents’ heights, then add ~6.5 cm for a boy or subtract ~6.5 cm for a girl. It’s a rough estimate (often off by several centimetres) and just for fun — many factors affect final height.
Sources: Mayo Clinic
Last reviewed: 2026-06
Frequently asked questions
How accurate is the mid-parental method? +
It’s a rough guide. Most children end up within about 8–9 cm (a few inches) of the estimate, but plenty fall outside it. It’s a fun ballpark, not a precise prediction.
What else affects how tall my child will be? +
Nutrition, overall health, sleep, and how they grow through childhood and puberty all matter alongside genetics. Two children with the same parents can end up quite different heights.
Can I predict height from my baby’s length now? +
Not reliably. Early length doesn’t map neatly to adult height. The parent-height method is a more common rule of thumb, though still just an estimate.
Should I worry if the estimate seems low or high? +
No — this is for fun only. If you have genuine concerns about your child’s growth, your provider can plot their measurements on proper growth charts over time.
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