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Infant Growth Chart Calculation: How To Know My Baby's Height and Weight Percenciles?

Updated: Aug 9, 2023

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Chart

Have you ever been confused by the height and weight restrictions when shopping for something for your new baby? It can be challenging to understand what age range is implied by these numbers.


For instance, when you come across a Graco SnugRide 35 Lite LX Infant Car Seat that is designed for babies weighing 4-35 pounds and measuring up to 32 inches, you may wonder when your baby will outgrow this car seat. To help answer questions like these, I have created infant growth charts (from birth to 24 months) calculated based on data from the World Health Organization (WHO), which is currently followed by the U.S. Centers for Disease Control and Prevention (CDC).

How you would use these


Here's a simple example: If you have a 4-month-old boy who measures around 25.50 inches in height, you can estimate based on this boy's length-for-age table that he is taller than about 75% of babies in the United States.

Similarly, if you have a 5-month-old girl weighing around 14 pounds, you can refer to the girl's weight-for-age table to estimate that she is heavier than about 25% of babies in the United States.

Hope this article helps and enjoy finding your baby's growth pattern!


Infant growth chart calculation


Boy's length-for-age percentiles


Infant growth chart calculation boy length

Girl's length-for-age percentiles


Infant growth chart calculation girl length

Boy's weight-for-age percentiles

Infant growth chart calculation boy weight

Girl's weight-for-age percentiles


Infant growth chart calculation girl weight

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