Child Growth Chart Calculator
Track height, weight and BMI percentiles with WHO/CDC growth references
Growth Assessment
Child Information
Growth Data
測量與追蹤提示
About the Child Growth Chart Calculator
About the Child Growth Chart Calculator
The Child Growth Chart Calculator compares a child's height, weight, BMI and head circumference with WHO and CDC growth percentiles. It is a tracking aid, not a medical diagnosis.
Key Features
- WHO and CDC reference standards
- Height, weight and BMI percentile estimates
- Head circumference support for infants and toddlers
- Growth trend chart and PDF export
What is a growth percentile?
A percentile shows where a child falls compared with children of the same age and sex. Trends over time are usually more useful than one isolated measurement.
How to Use
- Enter sex, birth date or age, and measurement date.
- Enter height and weight.
- Add head circumference for children up to 36 months when available.
- Review percentile results and track changes over time.
Frequently Asked Questions
How often should I measure a child?
Infants are often measured monthly. Ages 1-3 can be checked every 2-3 months, and older children every 3-6 months. Trends matter more than one isolated result.
Should I worry if my child's percentile is low?
A single measurement result doesn't indicate abnormality. What's important is observing if the growth curve is stable. If your child consistently grows along the 10th percentile, it's usually not a concern. However, if the growth curve suddenly changes (e.g., drops from 50th to 10th percentile), consult a pediatrician.
Will my data be stored?
All data is only stored in your browser's local storage (LocalStorage), not uploaded to servers, completely protecting your privacy.
Are the calculation results accurate?
This calculator uses official WHO/CDC LMS algorithms and parameters, with results consistent with professional medical tools. However, this tool is for reference only and cannot replace professional medical diagnosis.
Related Calculators
For broader family planning, use the pregnancy calculator or compare age-based milestones with the anniversary milestone calculator.
Data Sources
References include WHO Child Growth Standards and CDC Growth Charts. Consult a pediatric clinician for medical concerns.
