📏 Growth Calculator
See how your baby is growing! Enter their measurements to calculate their growth percentile based on World Health Organization (WHO) standards.
👶 Baby's Details
📈 Growth Results
Weight Percentile
Enter a weight to calculate.
Length Percentile
Enter a length to calculate.
Head Circumference Percentile
Enter a head circumference to calculate.
💡 Understanding Growth Charts
What are Percentiles?
A percentile shows how your baby compares to others of the same age and sex. A baby in the 40th percentile for weight is heavier than 40% of babies their age.
Any Percentile Can Be Healthy
The goal is not to be in the 99th percentile! A healthy baby can be in the 5th or 95th. Consistency is key.
Follow the Curve
Doctors look for your baby to follow their own growth curve over time. A sudden large jump or drop is more notable than the percentile itself.
📖 How to Read Your Baby's Growth Chart
Growth charts are one of the most important tools your pediatrician uses to monitor your baby's health. They plot your child's weight, length, and head circumference against standardized data from thousands of healthy children the same age and sex. The result is a percentile — a number that tells you where your baby falls compared to others.
For example, if your baby is in the 50th percentile for weight, that means they weigh more than 50% of babies their age and less than the other 50%. A baby in the 20th percentile is lighter than average but may be perfectly healthy — what matters is the trend over time, not a single measurement.
Pediatricians become concerned when a baby's growth crosses two or more percentile lines — either up or down — in a short time. This could signal a feeding issue, an underlying health condition, or simply a natural growth spurt. Always discuss growth concerns with your doctor rather than comparing your baby to other children.
Head circumference is tracked because it reflects brain growth. Rapid increases may warrant further evaluation, while slow growth could indicate nutritional deficiencies. This measurement is routinely taken at every well-child visit during the first two years.