Question: how long does it take a toddler to grow an inch?
Answer: Height Growth Rates 1–2 years: Grows about 5 inches (13 cm) 2–3 years: Grows about 3 1/2 inches a year most children will double their birth height by 3–4 years of age. 3 years to puberty: Grows about 2 inches (5 cm) a year.