As new parents, watching your little one grow is a mix of joy, wonder, and sometimes worry. Is my baby gaining enough weight? Is he too short or too tall for his age? What’s considered “normal”? It’s completely natural to worry, especially during the first two years when babies grow and change so quickly. That’s where growth charts come in.
Growth charts are tools that help track your baby’s development over time. They show typical weight, height (length), and head circumference for babies of different ages.
This guide covers baby boys’ growth chart from birth to 24 months, based on World Health Organization (WHO) standards. We'll walk you through ideal weight and height milestones at various ages, explain what the numbers mean, and help you feel confident about your baby’s progress.
Remember, every child is unique. Growing “normally” doesn’t mean growing exactly like someone else’s baby. What's most important is steady progress, not perfection.
Milestone Check: Growth Standards for Baby Boys
Here’s what healthy growth looks like at different ages. The numbers show the 3rd to 97th percentiles, meaning they cover the full range for most healthy babies (from smaller to larger ones).
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Ideal Weight and Height of a 3-Month-Old Baby Boy
At 3 months, your baby boy may weigh between 5.1 to 7.9 kg and measure 57.6 to 65.3 cm in length. At this stage, most babies are more alert, can lift their heads, and enjoy eye contact. If your baby falls within these ranges and seems happy and active, he's likely growing well.
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Ideal Weight and Height of a 6-Month-Old Baby Boy
By 6 months, he may weigh between 6.4 to 9.7 kg and measure 63.6 to 71.6 cm. Around now, babies typically learn to roll over, sit with support, and even babble. This is also a common age for introducing solid foods.
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Ideal Weight and Height of a 9-Month-Old Baby Boy
A 9-month-old baby’s height typically ranges from 67.7 to 76.2 cm, and weight from 7.2 to 10.9 kg. At this age, many babies start crawling, pulling up to stand, and exploring their surroundings. Physical growth often slows slightly, but development accelerates.
READ: Diet and Nutrition for Baby
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Ideal Weight and Height of a 12-Month-Old Baby Boy
Your baby is officially a toddler! The weight of a 1-year-old boy is between 7.8 and 11.8 kg, and he typically measures 71.3 to 80.2 cm in length. First birthdays often mark the beginning of walking and the end of babyhood.
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Ideal Weight and Height of a 15-Month-Old Baby Boy
A 15-month-old baby’s height and weight are around 74.4 to 83.9 cm and 8.4 to 12.7 kg. Your toddler may walk confidently, climb, and use a few words. You might notice spurts of independence and curiosity too.
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Ideal Weight and Height of an 18-Month-Old Baby Boy
An 18-month-old baby boy’s weight can range from 8.9 to 13.5 kg and length from 77.2 to 87.3 cm. During this age, motor skills improve rapidly. Toddlers often run, kick balls, and stack blocks. Language development is also in full swing.
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Ideal Weight and Height of a 21-Month-Old Baby Boy
At 21 months, your child might weigh 9.3 to 14.3 kg and measure 79.7 to 90.5 cm in height. Your little one might enjoy pretend play and follow simple instructions.
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Ideal Weight and Height of a 2-Year-Old Baby Boy
Two years old already? They grow up so fast, don’t they? The weight of a 2-year-old boy is between 9.8 and 15.1 kg, and he’s typically 82.1 to 93.6 cm tall. By this age, toddlers often string words into short phrases, climb stairs, and develop strong preferences. They’re growing not just in size, but in personality too.
WHO Growth Chart for Boys: Birth to 24 Months
Below is the height and weight chart for boys, recommended by WHO. This also includes head circumference for each age.
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Boy’s Growth Standards: Birth to 24 Months* |
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Months |
Length (cm) |
Weight (kg) |
Head circumference (cm) |
|
3rd to 97th percentile |
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|
0 |
46.3 – 53.4 |
2.5 – 4.3 |
32.1 – 36.9 |
|
1 |
51.1 – 58.4 |
3.4 – 5.7 |
35.1 – 39.5 |
|
2 |
54.7 – 62.2 |
4.4 – 7.0 |
36.9 – 41.3 |
|
3 |
57.6 – 65.3 |
5.1 – 7.9 |
38.3 – 42.7 |
|
4 |
60.0 – 67.8 |
5.6 – 8.6 |
39.4 – 43.9 |
|
5 |
61.9 – 69.9 |
6.1 – 9.2 |
40.3 – 44.8 |
|
6 |
63.6 – 71.6 |
6.4 – 9.7 |
41.0 – 45.6 |
|
7 |
65.1 – 73.2 |
6.7 – 10.2 |
41.7 – 46.3 |
|
8 |
66.5 – 74.7 |
7.0 – 10.5 |
42.2 – 46.9 |
|
9 |
67.7 – 76.2 |
7.2 – 10.9 |
42.6 – 47.4 |
|
10 |
69.0 – 77.6 |
7.5 – 11.2 |
43.0 – 47.8 |
|
11 |
70.2 – 78.9 |
7.4 – 11.5 |
43.4 – 48.2 |
|
12 |
71.3 – 80.2 |
7.8 – 11.8 |
43.6 – 48.5 |
|
13 |
72.4 – 81.5 |
8.0 – 12.1 |
43.9 – 48.8 |
|
14 |
73.4 – 82.7 |
8.2 – 12.4 |
44.1 – 49.0 |
|
15 |
74.4 – 83.9 |
8.4 – 12.7 |
44.3 – 49.3 |
|
16 |
75.4 – 85.1 |
8.5 – 12.9 |
44.5 – 49.5 |
|
17 |
76.3 – 86.2 |
8.7 – 13.2 |
44.7 – 49.7 |
|
18 |
77.2 – 87.3 |
8.9 – 13.5 |
44.9 – 49.9 |
|
19 |
78.1 – 88.4 |
9.0 – 13.7 |
45.0 – 50.0 |
|
20 |
78.9 – 89.5 |
9.2 – 14.0 |
45.2 – 50.2 |
|
21 |
79.7 – 90.5 |
9.3 – 14.3 |
45.3 – 50.4 |
|
22 |
80.5 – 91.6 |
9.5 – 14.5 |
45.4 – 50.5 |
|
23 |
81.3 – 92.6 |
9.7 – 14.8 |
45.6 – 50.7 |
|
24 |
82.1 – 93.6 |
9.8 – 15.1 |
45.7 – 50.8 |
Conclusion
Growth charts help you understand how your baby boy is progressing, but they’re just one piece of the puzzle. Every child grows at their own pace. As long as your baby eats, plays, and reaches milestones (even a little later), there’s often no cause for concern. When in doubt, don’t hesitate to check in with your doctor.
Frequently Asked Questions (FAQs)
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How can I monitor my baby boy’s growth at home?
Use a baby scale and a soft tape measure for length and head size, and compare it with the WHO’s boy’s height chart. Record changes monthly and discuss them during doctor visits.
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What is the average weight gain for a baby boy?
Most baby boys double their birth weight by around 5 months and triple it by 12 months. After that, weight gain slows down. You can refer to the above baby weight chart for age-specific ranges.
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At what point should I be concerned about my baby boy’s growth?
If your baby drops below the 3rd percentile, stops gaining weight, or falls off their growth curve, talk to your doctor.
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What can I do to support my baby boy’s healthy growth and development?
You can support his growth by providing balanced nutrition, ensuring he gets enough sleep, scheduling regular check-ups, and giving him lots of love, play, and interaction. Simple things like playtime, cuddles, and talking go a long way in helping him grow strong and healthy.
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Is it okay if my baby boy hits milestones a bit later than others?
Yes! Babies develop at their own pace. Late milestones are common and usually not a concern unless significantly delayed.
