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Height & Weight Percentiles of Infants & Toddlers

by
author image Alexis Jenkins
Alexis Jenkins writes to motivate others in areas of health including nutrition, fitness training and improving lifestyle choices. She graduated with a Bachelor of Science in health science from Brigham Young University-Idaho.
Height & Weight Percentiles of Infants & Toddlers
Your health care provider will use these charts to help ensure baby is on track. Photo Credit didesign021/iStock/Getty Images

In order to assist doctors in plotting children's height and weight, the Centers for Disease Control and Prevention developed growth and weight percentile charts. These charts show how the size and growth patterns of one child compare with other children of the same age and gender. The higher the percentile, the bigger the child is; the lower the percentile, the smaller the child is. For example, a 2-year-old girl in the 20th percentile for weight means that 20 percent of all girls her age weigh less than she does, and 80 percent weigh more.

Height Percentiles for MaleToddlers

Newborn baby boys in the fifth percentile are 45.56 cm long, 49.9 cm in the 50th percentile, and 54.3072 cm in the 95th percentile. At two and a half months, boys in the fifth percentile are 63.841 cm long, 67.86 cm in the 50th percentile, or 72.563 cm long in the 95th percentile. At 12 and a half months, a boy in the fifth percentile is 71.52 cm, 76.11 cm in the 50th percentile, and 81.42 cm in the 95th percentile. At 18-1/2 months, a boy in the fifth percentile is 77.19 cm, 82.40 cm in the 50th percentile, and 87.90 cm in the 95th percentile. At 24-1/2 months, a boy is 80.99 cm in the fifth percentile, 87.66 cm in the 50th percentile, and 93.48 cm in the 95th percentile.

Height Percentiles for Female Toddlers

Newborn girls in the fifth percentile are 45.47 cm long, 49.28 cm long in the 50th percentile, and 53.77 cm in the 95th percentile. At six and a half months old, girls in the fifth percentile are 61.77 cm, 66.11 cm in the 50th percentile, and 70.35 cm in the 95th percentile. Girls that are 12 and a half months old are 69.49 cm in the fifth percentile, 74.39 cm long in the 50th percentile, and 79.13 cm long in the 95th percentile. At 18-1/2 months, girls in the fifth percentile are 75.42 cm long, 80.79 cm long in the 50th percentile, and 86.06 cm in the 95th percentile. Girls who are 24-1/2 months old are 80.39 cm in the fifth percentile, or 86.19 cm in the 50th percentile, and 91.98 cm in the 95th percentile.

Weight Percentiles for Male Toddlers

Newborn baby boys in the fifth percentile are 2.52 kg, 3.53 kg in the 50th percentile, and 4.34 kg in the 95th percentile. At six and a half months, a boy in the fifth percentile is 6.56 kg, and 8.16 in the 50th percentile, and 9.88 kg in the 95th percentile. At 12 and a half months, a boy in the fifth percentile will be 8.75kg, 10.45 kg in the 50th percentile, and 12.57kg in the 95th percentile. At 18-1/2 months, if a boy is in the fifth percentile, he will be 9.90 kg, 11.80 kg in the 50th percentile, or 14.14 kg in the 95th percentile. A 24-1/2 month old boy in the fifth percentile will be 10.70 kg, 12.74 kg in the 50th percentile, or 15.27 kg in the 95th percentile.

Weight Percentile for Female Toddlers

A newborn baby girl who is 2.54 kg will fall under the fifth percentile, 3.39 kg in the 50th percentile, and 4.15 kg in the 95th percentile. A six and a half month old baby girl who ways 6.13 kg will be in the fifth percentile, 7.45 kg in the 50th percentile, and 8.95 kg in the 95th percentile. A 12 and a half month old girl who weighs 8.12 kg will be in the fifth percentile, 9.66 kg in the 50th percentile, and 11.55 kg in the 95th percentile. At 18-1/2 months, a baby girl who weighs 9.39 kg will be in the fifth percentile, 11.08 kg in the 50th percentile, and 13.28 kg in the 95th percentile. At 24-1/2 months, a baby in the fifth percentile will weigh 10.27 kg, 12.13 kg in the 50th percentile, and 14.67 kg in the 95th percentile.

Considerations

The numbers listed do not specify all age, weight or height ratios for all babies and toddlers.
Talk to your doctor to learn more about the specific percentiles for your child, as well as the significance and relevance of those statistics. Remember that every child is different and will go through her own unique growth and development patterns.

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