Average Height by Age: Growth Spurts, Milestones & CDC Percentile Tables

1. Childhood Growth Velocity: From Toddler to Puberty

Human physical growth does not occur at a linear rate. The fastest growth phase in human life occurs during the first year of infancy, when infants gain roughly 25 cm (10 inches).

Between ages 4 and 10, growth stabilizes into a steady prepubertal velocity of approximately 5 to 6 cm (2 to 2.5 inches) per year.

Adolescence brings the second and final dramatic acceleration: the adolescent growth spurt (Peak Height Velocity or PHV).

2. Gender Differences in Growth Spurt Timing

Females generally enter their adolescent growth spurt approximately 2 years earlier than males:

• Girls typically begin their growth spurt between ages 10 and 12, reaching Peak Height Velocity around age 12 to 13 (averaging 7 to 9 cm per year), and cease growing around age 15 to 16.

• Boys enter puberty later, usually between ages 12 and 14, experiencing peak velocity around age 14 to 15 (averaging 9 to 11 cm per year). Because boys experience two extra years of prepubertal childhood growth before their spurt begins, adult men are on average 13 to 14 cm (5.5 inches) taller than adult women.

3. When Should You Consult a Pediatric Endocrinologist?

Parents should seek specialized medical evaluation if a child's height velocity drops below the 3rd percentile, crosses two major percentile lines downward on standard CDC growth charts, or shows zero vertical growth over a 12-month period.

Early diagnostic testing can detect treatable endocrine issues before epiphyseal plates fuse.