Child Growth Percentile Calculator
See how your child's height and weight compare to the average for their age
Enter your child's sex, age in months, height, and weight, and this tool instantly compares them against the 50th percentile (the average) from the Korea Disease Control and Prevention Agency's 2017 standard growth charts. Every calculation runs in your browser, so your child's information is never sent to a server — making it an easy way for parents to keep an eye on growth trends at home.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Select your child's sex (boy or girl).
- Enter their age in months (0 to 72).
- Enter their height in centimeters and weight in kilograms.
- Instantly see how their height and weight compare to the average for their age, along with an under-growth, normal, or over-growth reading.
FAQ
- Can this replace a growth check at the doctor's office?
- No. This is a simple simulation that compares your numbers to the averages in the 2017 standard growth charts. An accurate developmental assessment requires an exam by a pediatrician.
- Is my child's information saved or sent anywhere?
- No. Everything is calculated inside your browser and nothing is transmitted to or stored on a server.
- Can I use it for a child older than 72 months (6 years)?
- This tool only includes data for ages 0 to 72 months, so results for older children won't be accurate.