A baby's weight, height and head circumference can be compared with other babies of the same age by placing them on a percentile scale. For example, a baby who is in the 75th percentile for height is taller than 75 per cent of other babies his/her age and shorter than 25 per cent. Percentiles for height and weight cover a wide range of what is "normal" for babies, and as long as your baby is growing consistently, you should not worry if his/her percentile is on the low or high end of the chart. If you have any concerns, talk to your baby's paediatrician.
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Visit the PregnancyToday website (Resource 1).
Enter your baby's gender, age in months, weight, height and head circumference (optional).
Click the "Calculate Percentiles" button to receive your baby's height, weight and head circumference percentiles.
Go to the Resource 2 if your baby is breastfed. Breastfed babies grow at different rates than formula-fed babies. Standard height and weight percentile charts were developed based on formula-fed babies' growth rates.
Click on your baby's age range. There are charts for babies and children up to 5 years old.
Find your baby's age on the bottom of the chart that opens in a new window. Then find your baby's weight on the left side. Pinpoint where the lines intersect to find the baby's weight percentile.
Click on your baby's age range under the category "Weight for Length" or "Weight for Height" to find out how her height lines up with her weight.
Find your baby's height on the bottom of the graph and weight on the left side. The place where the two lines meet is your baby's percentile for weight for length.
Go to Resource 3 if you need to convert your baby's height from inches to centimetres or vice versa, or you need to convert your baby's weight from pounds to kilograms or vice versa.
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