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Verified By Apollo Pediatrician November 20, 2024
Tracking your baby boy’s growth and development during his first two years is essential for his physical, cognitive, and emotional well-being. This period is a foundation for his overall growth.
To assist you, this boys’ growth chart provides measurement ranges from the 3rd to 97th percentile, following WHO standards.
| Age (Months) | Average Weight (kg) | Average Length (cm) | Head Circumference (cm) |
| 0 (Newborn) | 2.6–4.6 | 46–55 | 33–36 |
| 1 Month | 3.5–5.6 | 51–59 | 34.5–38 |
| 2 Months | 4.5–6.6 | 54–62 | 36.5–40 |
| 3 Months | 5.6–7.6 | 57–64 | 38–42 |
| 4 Months | 6–8 | 59–66 | 39–43 |
| 5 Months | 6.5–8.5 | 61–68 | 40–44 |
| 6 Months | 7–9.2 | 63–71 | 41–45 |
| 7 Months | 7.5–9.6 | 65–72 | 42–45.5 |
| 8 Months | 7.8–9.8 | 66–74 | 42.5–46 |
| 9 Months | 8–10.5 | 68–76 | 43–46.5 |
| 10 Months | 8.2–10.8 | 69–77 | 43.5–47 |
| 11 Months | 8.4–11.2 | 70–78 | 44–47.2 |
| 12 Months | 8.5–11.5 | 71–80 | 44.5–47.5 |
| 13 Months | 8.7–11.8 | 72–81 | 45–47.8 |
| 14 Months | 8.9–12 | 73–82 | 45.2–48 |
| 15 Months | 9–12.2 | 74–83 | 45.5–48.2 |
| 16 Months | 9.2–12.4 | 75–84 | 45.8–48.5 |
| 17 Months | 9.5–12.6 | 76–85 | 46–48.8 |
| 18 Months | 10–12.5 | 78–87 | 46.2–49 |
| 19 Months | 10.2–12.8 | 79–88 | 46.5–49.2 |
| 20 Months | 10.5–13 | 80–89 | 46.8–49.4 |
| 21 Months | 10.7–13.2 | 81–90 | 47–49.6 |
| 22 Months | 10.8–13.4 | 82–91 | 47.2–49.8 |
| 23 Months | 11–13.6 | 82.5–92 | 47.5–50 |
| 24 Months | 11–13.8 | 83–93 | 47.5–50 |
At 3 months, your baby boy will have experienced rapid growth. The average weight of a 3-month-old baby boy is between 5.6 to 7.6 kg, and his average length is 57 to 64 cm. During this stage, your baby is becoming more alert and developing better head control. Regular feedings and proper rest are key to supporting his growth.
By 6 months, your baby boy continues to grow steadily. The average weight for a 6-month-old baby boy is 7.0 to 9.2 kg, and his average length is 63 to 71 cm. Growth starts to stabilize, but he still gains weight and length. Around this time, many babies begin to eat solid foods, which help with their continued development.
At 9 months, your baby boy is likely more active. His average weight is 8.0 to 10.5 kg, and his average length is 68 to 76 cm. Many babies at this stage start crawling and moving around more, which can increase their appetite and energy needs. You’ll notice improved coordination and strength as your baby explores his environment.
By his first birthday, your baby boy will have slowed down a bit in terms of growth, but he’s still developing rapidly. The average weight for a 12-month-old baby boy is 8.5 to 11.5 kg, and his average length is 71 to 80 cm. At this point, many babies start walking, which marks a big milestone in their development. While growth slows, his skills are expanding quickly.
At 15 months, your baby boy continues to grow and develop both physically and cognitively. His average weight is 9.0 to 12.2 kg, and his average length is 74 to 83 cm. Many babies are walking confidently by now, and they’re starting to explore their surroundings more actively. Language skills and social interactions are also starting to develop.
At 18 months, the growth rate slows a little, but your baby boy is becoming more independent. His average weight is 10.0 to 12.5 kg, and his average length is 78 to 87 cm. At this age, many babies start running, climbing, and exploring more, which helps their muscle development. Their language and social skills also continue to grow.
By 21 months, your baby boy’s growth becomes more gradual. The average weight is 10.7 to 13.2 kg, and his average length is 81 to 90 cm. While his physical growth slows down a bit, his cognitive and social development continues to accelerate. He might start forming simple sentences and interacting more with others.
At 24 months (2 years old), your baby boy enters toddlerhood. His average weight is 11.0 to 13.8 kg, and his average length is 83 to 93 cm. While physical growth slows down, your baby will focus more on developing motor, social, and cognitive skills. This stage marks the start of more complex learning and exploration.
1. How can I track my baby boy’s growth at home?
Track your baby boy’s growth by measuring his weight, length, and head circumference at home using a scale and measuring tape. You can also monitor developmental milestones, such as when he begins rolling over, sitting up, crawling, or walking. However, always check in with your pediatrician during routine visits to ensure your baby’s growth is on track.
2. What is the typical weight gain for a baby boy?
In the early months, baby boys typically gain 150-200 grams per week. By the time they are 6 months old, this slows to around 100-150 grams per week. After six months, babies continue to gain weight, but at a slower rate, about 70-100 grams per week.
3. When should I be concerned about my baby boy’s growth?
If your baby boy consistently falls below the growth percentiles or if there’s a noticeable drop in growth, it’s best to consult your pediatrician. If he isn’t reaching typical developmental milestones or showing signs of poor feeding or other issues, it’s important to seek medical advice.
4. Why is my baby boy’s head circumference important?
Head circumference is an indicator of your baby boy’s brain growth and overall development. A sudden increase or decrease could signal conditions like hydrocephalus or malnutrition, so it’s important to track it regularly and consult a healthcare provider if there are any concerns.
5. How can I encourage my baby boy’s growth and development?
Make sure your baby is receiving proper nutrition, whether through breast milk or formula, and begin solid foods around 6 months as advised by your pediatrician. Provide a safe environment for exploration, engage in tummy time, and offer plenty of opportunities for interaction and learning.
6. Do baby boys grow differently from baby girls?
Yes, baby boys tend to grow faster than baby girls, especially in the first few months. They generally have a higher weight and length during the early stages of infancy, although both boys and girls follow similar growth patterns as they get older.
7. Is it normal if my baby boy doesn’t meet milestones exactly at the expected time?
Every baby is unique, and developmental milestones can vary. Some babies meet milestones earlier, while others might take a little longer. If you have concerns about your baby boy’s development, discuss them with your pediatrician to ensure everything is progressing well.
Conclusion:
Tracking your baby boy’s growth and development is essential in ensuring that he is thriving. By understanding his physical and emotional milestones, you can be more confident in your caregiving journey. Regular check-ups with your pediatrician will also help confirm that his growth is on track.
If you have any concerns about your baby boy’s development, don’t hesitate to reach out to your pediatrician. At Apollo Hospitals, we provide expert care and support for every step of your baby’s growth journey.
Our team of expert Pediatricians, who bring years of clinical experience treating simple-to-complicated medical conditions in children, help us to consistently create high-quality, empathetic and engaging content to empower readers make an informed decision.
