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Fetal Doppler Set with Color Screen
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Baby Height and Weight Chart by Age
Babies are born about 49–50 cm long and weigh about 3.2–3.3 kg (WHO average). At 1 year the average is 74–76 cm and 8.9–9.6 kg, at 2 years 86–87 cm and 11.5–12.2 kg, and at 5 years about 110 cm and 18 kg. Healthy children vary around the average; what matters is steady growth along their own curve, followed by their doctor.
Growth percentile calculator
✨ Compare your baby’s height and weight with the WHO average
Baby length / height chart by age
The bold number is the WHO median; in brackets the approximate normal range (about ±2 standard deviations).
| Age | Boys (cm) | Girls (cm) |
|---|---|---|
| Birth | 49.9 (46.4–53.4) | 49.1 (45.7–52.5) |
| 1 mo | 54.7 (50.9–58.5) | 53.7 (49.9–57.5) |
| 2 mo | 58.4 (54.3–62.5) | 57.1 (53.1–61.1) |
| 3 mo | 61.4 (57.1–65.7) | 59.8 (55.6–64.0) |
| 4 mo | 63.9 (59.4–68.4) | 62.1 (57.8–66.4) |
| 5 mo | 65.9 (61.3–70.5) | 64 (59.5–68.5) |
| 6 mo | 67.6 (62.9–72.3) | 65.7 (61.1–70.3) |
| 7 mo | 69.2 (64.4–74.0) | 67.3 (62.6–72.0) |
| 8 mo | 70.6 (65.7–75.5) | 68.7 (63.9–73.5) |
| 9 mo | 72 (67.0–77.0) | 70.1 (65.2–75.0) |
| 10 mo | 73.3 (68.2–78.4) | 71.5 (66.5–76.5) |
| 11 mo | 74.5 (69.3–79.7) | 72.8 (67.7–77.9) |
| 1 yr | 75.7 (70.4–81.0) | 74 (68.8–79.2) |
| 1.3 yr | 79.1 (73.6–84.6) | 77.5 (72.1–82.9) |
| 1.5 yr | 82.3 (76.5–88.1) | 80.7 (75.1–86.3) |
| 1.8 yr | 85.1 (79.1–91.1) | 83.7 (77.8–89.6) |
| 2 yr | 87.1 (81.0–93.2) | 85.7 (79.7–91.7) |
| 2.5 yr | 91.9 (85.5–98.3) | 90.7 (84.4–97.0) |
| 3 yr | 96.1 (89.4–102.8) | 95.1 (88.4–101.8) |
| 3.5 yr | 99.9 (92.9–106.9) | 99 (92.1–105.9) |
| 4 yr | 103.3 (96.1–110.5) | 102.7 (95.5–109.9) |
| 4.5 yr | 106.7 (99.2–114.2) | 106.2 (98.8–113.6) |
| 5 yr | 110 (102.3–117.7) | 109.4 (101.7–117.1) |
Baby weight chart by age
| Age | Boys (kg) | Girls (kg) |
|---|---|---|
| Birth | 3.3 (2.6–4.1) | 3.2 (2.6–4.0) |
| 1 mo | 4.5 (3.6–5.6) | 4.2 (3.4–5.3) |
| 2 mo | 5.6 (4.5–7.0) | 5.1 (4.1–6.4) |
| 3 mo | 6.4 (5.1–8.0) | 5.8 (4.6–7.3) |
| 4 mo | 7 (5.6–8.8) | 6.4 (5.1–8.0) |
| 5 mo | 7.5 (6.0–9.4) | 6.9 (5.5–8.6) |
| 6 mo | 7.9 (6.3–9.9) | 7.3 (5.8–9.1) |
| 7 mo | 8.3 (6.6–10.4) | 7.6 (6.1–9.5) |
| 8 mo | 8.6 (6.9–10.8) | 7.9 (6.3–9.9) |
| 9 mo | 8.9 (7.1–11.1) | 8.2 (6.6–10.3) |
| 10 mo | 9.2 (7.4–11.5) | 8.5 (6.8–10.6) |
| 11 mo | 9.4 (7.5–11.8) | 8.7 (7.0–10.9) |
| 1 yr | 9.6 (7.7–12.0) | 8.9 (7.1–11.1) |
| 1.3 yr | 10.3 (8.2–12.9) | 9.6 (7.7–12.0) |
| 1.5 yr | 10.9 (8.7–13.6) | 10.2 (8.2–12.8) |
| 1.8 yr | 11.5 (9.2–14.4) | 10.9 (8.7–13.6) |
| 2 yr | 12.2 (9.8–15.3) | 11.5 (9.2–14.4) |
| 2.5 yr | 13.3 (10.6–16.6) | 12.7 (10.2–15.9) |
| 3 yr | 14.3 (11.4–17.9) | 13.9 (11.1–17.4) |
| 3.5 yr | 15.3 (12.2–19.1) | 15 (12.0–18.8) |
| 4 yr | 16.3 (13.0–20.4) | 16.1 (12.9–20.1) |
| 4.5 yr | 17.3 (13.8–21.6) | 17.2 (13.8–21.5) |
| 5 yr | 18.3 (14.6–22.9) | 18.2 (14.6–22.8) |
Source: WHO Child Growth Standards medians; ranges approximate. For general guidance; your baby’s doctor is the reference.
How fast do babies grow in the first year?
- Newborns often lose up to 7–10% of birth weight in the first days and regain it by about 2 weeks.
- Birth weight roughly doubles by 4–5 months and triples by 12 months.
- Length grows about 25 cm in year one, about 12 cm in year two, then 6–8 cm a year.
- Growth spurts bring a few days of extra hunger and sleep, which is normal.
From height to clothing size
Baby clothing sizes are the child’s height in cm: a 72 cm baby fits size 73 and an 85 cm toddler fits size 90. The calculator above suggests the size; details are in the baby clothes size chart.
How to measure at home
- Length: lay your baby flat and measure from the top of the head to the heel with the legs gently straightened. After 2 years measure standing, without shoes.
- Weight: weigh yourself holding the baby, then alone; the difference is the baby’s weight.
- Measure at the same time of day in similar clothing and note the numbers.
When to see the doctor
- If your newborn has not regained birth weight by 2 weeks.
- If weight or length stops increasing for months or clearly drops to a lower curve.
- If low weight comes with poor feeding, few wet diapers or unusual sleepiness.
See also how much milk your baby needs and sleep by age.
Frequently asked questions
What is a normal newborn length?
The WHO median is 49.9 cm for boys and 49.1 cm for girls; roughly 46–54 cm is normal.
What is a normal newborn weight?
The median is 3.3 kg for boys and 3.2 kg for girls; roughly 2.5–4.2 kg is normal.
How much should a 6-month-old weigh?
About 7.9 kg for boys and 7.3 kg for girls on average; roughly 6–9.8 kg is normal.
How tall is a 1-year-old?
About 75.7 cm for boys and 74 cm for girls on average, around 25 cm more than at birth.
How much does a 1-year-old weigh?
About 9.6 kg for boys and 8.9 kg for girls, roughly three times birth weight.
How tall is a 2- or 3-year-old?
About 87 cm (boys) and 86 cm (girls) at 2 years, and 96 cm and 95 cm at 3 years.
When does a baby double its birth weight?
Around 4–5 months, and it roughly triples by 12 months.
What does a baby growth percentile mean?
It shows how many of 100 children of the same age and sex are smaller. The 50th percentile is the average; the 25th means 25 of 100 are smaller. Roughly the 3rd to 97th percentile is normal, and steady growth along one curve matters most.
My baby is below average. Is that a problem?
Not necessarily: half of healthy babies are below the median. What matters is staying in the normal range and growing steadily, as judged by your doctor.
What clothing size fits my baby’s height?
Size number ≈ height in cm: 66 for 63–68 cm, 73 for 69–74 cm, 80 for 75–82 cm and 90 for 83–92 cm.
