Age-by-Age Growth Chart and Developmental Milestones for Children
A comprehensive guide on your child’s physical growth and developmental milestones from infancy to school age.
Every child follows a unique path in physical growth and development. Tracking height, weight, and developmental milestones helps parents and caregivers understand patterns of healthy growth and recognize when additional support may be needed. This article provides age-by-age guidelines on children’s growth, explains how to interpret growth charts, and details the key developmental milestones from birth through school-age years.
Understanding Growth Charts
Growth charts are essential tools for pediatricians and parents to record and monitor children’s height, weight, and body mass index (BMI) over time. They provide a visual representation of the percentiles for measurements, aiding early identification of possible growth concerns. There are separate charts for boys and girls, and for different ages, reflecting gender and age-based growth patterns. For children with conditions such as Down syndrome or those born prematurely, doctors use specialized growth charts.
Children grow at their own pace, and genetics, nutrition, health, environment, and hormones can all impact growth. It is normal for growth rates to vary—especially during infancy and puberty. Pediatricians do not rely solely on growth charts; they also consider family history, well-being, and overall development.
- Growth charts track: Height, weight, head circumference (for infants)
- Percentile curves: Compare your child’s growth with peers
- Separate charts: For boys and girls; birth to 36 months and ages 2–20 years
- Pediatric review: Growth charts are supplemented by health and developmental assessments
Interpreting Growth Percentiles
A child’s growth percentile denotes how their size compares with others of the same gender and age. For example, a child in the 75th percentile for height is taller than 75% of peers. Consistent tracking is key; sudden drops or spikes in percentile curves may signal issues worth discussing with a pediatrician.
| Age | Girls: Average Height | Girls: Average Weight | Boys: Average Height | Boys: Average Weight |
|---|---|---|---|---|
| Newborn | 19-20 in (48.2-50.8 cm) | 7-7.5 lbs (3.2-3.4 kg) | 19.5-20.5 in (49.5-52 cm) | 7.5-8 lbs (3.4-3.6 kg) |
| 1 year | 28.5-29.5 in (72.4-75 cm) | 19-21 lbs (8.6-9.5 kg) | 29-30 in (74-76.2 cm) | 20-22 lbs (9-10 kg) |
| 2 years | 33-34 in (83.8-86.4 cm) | 26-28 lbs (11.8-12.7 kg) | 33.5-34.5 in (85-87.6 cm) | 27.5-29 lbs (12.4-13.2 kg) |
| 3 years | 36-37.5 in (91.4-95.3 cm) | 31-33 lbs (14-15 kg) | 37-38.5 in (94-97.8 cm) | 32-34 lbs (14.5-15.4 kg) |
| 4 years | 39-40.5 in (99-103 cm) | 35-39 lbs (15.9-17.7 kg) | 40-41.5 in (101.6-105.4 cm) | 36-40 lbs (16.3-18.1 kg) |
| 5 years | 41.5-43 in (105.4-109.2 cm) | 39-43 lbs (17.7-19.5 kg) | 42-44 in (106.7-111.8 cm) | 41-45 lbs (18.6-20.4 kg) |
Note: Values vary based on genetics, health, and environment.
Physical and Developmental Milestones by Age
Height and weight alone do not tell the full story of a child’s physical development. Key milestones tracked by health experts include gross motor, fine motor, communication and social, and cognitive or adaptive skills.
Below is an age-by-age guide to physical and developmental expectations.
Newborn to 2 Months
- Turns head side to side while lying on back
- Lifts head and turns to both sides during tummy time
- Kicks legs and moves arms equally
- Shows reflex movements (e.g., rooting, sucking)
3–4 Months
- Raises head in line with trunk when pulled to sitting
- Pushes up on forearms during tummy time
- Tolerates tummy time more easily
- Rolls from belly to back
- Grasps and shakes toys
5 Months
- Rolls from back to belly
- Brings feet to mouth while lying on back
- Pushes up on hands with extended arms
- Turns in a circle while on belly
6–8 Months
- Sits alone unassisted
- Reaches for toys in sitting position
- Catches self if losing balance
- Crawls on belly
- Transfers objects hand-to-hand
9–11 Months
- Moves from lying down to sitting upright without help
- Crawls on hands and knees
- Pulls to stand using furniture
- “Cruises” (walks holding to furniture)
- Walks with two hands held
12 Months (1 Year)
- Stands and walks alone
- Fine pincer grasp (picks up objects with thumb and forefinger)
- Uses basic words (e.g., “Mama,” “Dada”)
- Points to objects of interest
13–14 Months
- Crawls up stairs
- Stands up from the floor independently
- Walks alone with balance
- Squats and stands up without help
15–18 Months
- Walks up stairs with help from hands or rails
- Crawls down stairs feet-first
- Begins to run (may fall often)
- Kicks a ball forward
- Uses spoon and cup
- Builds small block towers
2 Years
- Walks and runs well
- Jumps in place with both feet leaving the ground
- Walks up and down stairs solo
- Kicks a ball with either foot
- Forms short sentences
- Copies lines with crayon
- Removes simple clothing
3 Years
- Balances on one foot for several seconds
- Jumps forward up to two feet
- Catches a large ball
- Rides a tricycle
- Speaks in three-word sentences
- Copies shapes (circle)
- Brushes teeth with help
4 Years
- Runs, jumps, and climbs skillfully
- Hops on one foot and can do hopscotch
- Catches a ball reliably
- Begins to skip
- Copies shapes (square or cross)
- Keeps up with peers in cooperative play
5 Years
- Skips on alternating feet
- Jumps rope, begins skating/swimming
- Rides a bicycle (may be without training wheels)
- Climbs with confidence
- Communicates with clear five-word sentences
- Dresses and grooms self
- Copies triangle shapes
Children may develop at different rates. A wide range of timing is normal.
Measuring Physical Development: Tips for Parents
- Use growth charts and regular doctor visits to monitor growth, but also pay attention to overall health and milestones.
- Growth pattern consistency matters more than percentile rank. Sudden changes warrant discussion with your pediatrician.
- Chronic health issues, genetic factors, and environment can influence growth rates.
- Premature babies and children with health conditions may use adjusted or specialized growth charts.
- Be patient with temporary developmental delays; children often catch up with peer averages over time.
Frequently Asked Questions (FAQs)
Q: What if my child isn’t in the average percentile?
A: Percentiles show how your child compares to others but are not an indicator of health by themselves. Consistent growth patterns are most important; consult your pediatrician for concerns about sudden changes or if your child isn’t reaching developmental milestones.
Q: Will my child’s growth percentiles stay the same?
A: Not necessarily. It is normal for children’s percentile rankings to shift, especially during infancy, toddler years, or puberty. Isolated changes often do not signal a problem.
Q: How do genetics affect my child’s growth?
A: Children’s height and weight are heavily influenced by genetics—including parental height, metabolism, and ethnic background. Compare with family averages and share relevant information with your doctor during checkups.
Q: What milestones should I track besides height and weight?
A: Parents are encouraged to monitor physical, cognitive, social, and emotional developmental milestones, such as motor skill progression, language, and social play. Each category provides insight into growth and readiness for school and social environments.
Q: What should I do if my child isn’t meeting certain milestones?
A: If you notice developmental delays, consult your pediatrician. Early intervention is beneficial and can support a child’s continued progress.
Signs That May Signal a Growth or Development Concern
References
- https://www.chrichmond.org/services/therapy-services/developmental-milestones/gross-motor-skills-birth-to-5-years/
- https://med.stanford.edu/content/dam/sm/pediatricsclerkship/documents/5-Developmental-Milestones-MedU.pdf
- https://nortonchildrens.com/services/pediatrics/developmental-milestones-by-age/
- https://choc.org/ages-stages/
- https://www.cdc.gov/act-early/milestones/index.html
- https://depts.washington.edu/dbpeds/Screening%20Tools/Devt%20Milestones%20Table%20(B-6y)%20PIR%20(Jan2016).msg.pdf
- https://www.asha.org/public/developmental-milestones/
- https://cambspborochildrenshealth.nhs.uk/child-development-and-growing-up/milestones/
- https://www.who.int/tools/child-growth-standards/standards/motor-development-milestones
