Baby growth by month: weight, length & head circumference
How much babies typically weigh, how long they are, and their head circumference, month by month from birth to 2 years -- from the CDC 2000 reference, for boys and girls. Every number is a range, never a target; your doctor tracks the trend over time.
In short
- These numbers come from the US CDC 2000 growth reference, a reference based on US children -- not the World Health Organization's growth standards. For babies under 2, CDC and the American Academy of Pediatrics recommend doctors use the WHO growth standards instead, whatever the feeding type; in India, the Indian Academy of Pediatrics recommends WHO's charts for children under five. Ask your doctor which chart they use for your baby.
Which growth chart does your doctor use?
The CDC 2000 reference used on these pages is a licence-clean data source, not the reference doctors are told to use for infants. For ages 0-2, CDC/AAP recommend clinicians use the WHO growth standards instead, and (for India) IAP recommends WHO's charts under age five. Every growth page must say so plainly, near the top, and never imply the CDC 2000 numbers are 'the' standard a doctor uses to judge a baby under 2.
CDC and the American Academy of Pediatrics (AAP) recommend that U.S. health care providers in primary-care settings use: WHO child growth standards for children birth to 2 years to monitor growth, regardless of feeding type.
CDC / American Academy of Pediatrics (AAP), Recommendations and Rationale -- Growth Chart Training -- CDC. Retrieved 2026-09-26. Quoted verbatim.
Indian academy of pediatrics (IAP) produced and recommended IAP 2015 Growth charts for monitoring Indian children between the age of 5 to 18 years and recommended simplified WHO growth charts for monitoring of children under the age of five years.
Indian Academy of Pediatrics (IAP), Pediatrician-friendly growth charts for 0-18-year-old Indian children (Dr Bakul Parekh, Dr Vaman Khadilkar), iapindia.org. Retrieved 2026-09-26. Quoted verbatim.
By measurement (full table, birth to 2 years)
By age
Educational information, not medical advice -- always consult your doctor.