Baby Growth Chart: Weight and Height Percentile Calculator

Our Baby Growth Percentile Calculator helps you understand how your baby’s size compares with others of the same age and gender. By entering your child’s weight, height (or length), and head circumference, you’ll get percentile scores for each measurement.

Using Our Baby Growth Chart

During the first months, you’ll visit your pediatrician frequently to monitor your baby’s growth. At each visit, your pediatrician will record your baby’s weight, height, and head circumference on a growth chart, providing insights into how your little one is progressing. Regular growth indicates good health, even if your child isn’t exactly in the middle of the chart.

Growth percentiles show where your baby’s measurements fall relative to peers of the same age and gender. For instance, if your baby’s weight is in the 20th percentile, they weigh more than 20% of children in their category. It’s perfectly normal for some children to fall into the 10th percentile and others into the 90th; what’s most important is consistent growth over time.

Our calculator is an educational tool and isn’t a substitute for professional growth assessments. Pediatricians track growth patterns over time to ensure healthy development.

This calculator is designed for children under age 2, based on data from the World Health Organization. For older kids, try our Child Height Predictor to estimate adult height.

Measurements Healthcare Providers Use—and How to Measure at Home

Baby Weight To weigh your baby at home between doctor visits:

1. Hold your undressed baby and step on a scale, noting the weight.
2. Weigh yourself alone and subtract that number from the combined weight. Although this method is less precise than a doctor’s scale, it gives a close estimate. If you have concerns about your baby’s weight, your pediatrician can provide a more accurate assessment.

Baby Height Until your baby can stand independently, “height” is measured as “length” from head to heel. To measure at home:

1. Lay your baby on a flat surface and use a tape measure from head to heel.
2. Since babies tend to bend their knees, you may need someone to hold their legs straight.
3. Record the length to the nearest tenth of a centimeter or inch.

Baby Head Circumference Head circumference is monitored during the first two years to assess brain growth. You can measure this at home:

1. Wrap a flexible tape around the widest part of your baby’s head, just above the eyebrows and ears, and around the back.
2. Measure three times and use the largest measurement to the nearest tenth of a centimeter.

This tool provides useful information between visits, helping you stay aware of your baby’s growth patterns.