A single measurement is a snapshot; velocity is the movie. How fast a baby grows between checkups often reveals more than where the last point landed.
Speed between visits
Growth velocity is the change between two measurements over time — grams per week or centimeters per month. In the first months it is high, then it naturally slows.
Why it sharpens the picture
Velocity catches problems early. A baby whose percentile is still normal but whose speed has flattened for two visits is worth a closer look before the curve ever dips.
Expect the natural slowdown
Velocity falls steeply across the first year by design. Comparing your baby's speed to the age-appropriate pace matters more than comparing it to a newborn's.
GrowChart shows the speed
GrowChart computes velocity between every pair of measurements and compares it to the expected pace, so you see the slowdown that is normal and the one worth mentioning.
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