Toddler Growth Tracker (0-3 Years)
Monitor your child's growth against WHO Child Growth Standards. Calculates Weight-for-Age and Height-for-Age percentiles for toddlers aged 0 to 36 months.
About
Between birth and age three, children undergo the most rapid physical development of their lives. Tracking this growth is essential not just for buying clothes, but for ensuring they are meeting nutritional and developmental milestones. The World Health Organization (WHO) provides the global standard for how healthy children should grow.
This tool simplifies the complex WHO data tables. Instead of squinting at curves on a paper chart, simply enter your toddler's age, weight, and height to instantly see where they fall compared to their peers. It helps identify growth spurts or potential issues like failure to thrive (underweight) or rapid weight gain.
Formulas
We use the LMS Method (Lambda-Mu-Sigma) provided by the WHO to calculate precise Z-scores and percentiles.
Where:
- X is your child's measurement.
- L (Box-Cox power), M (Median), and S (Coefficient of Variation) are values from the WHO database for the specific age and gender.
Reference Data
| Age (Months) | Boys Median Weight (kg) | Girls Median Weight (kg) | Boys Median Height (cm) | Girls Median Height (cm) |
|---|---|---|---|---|
| 0 (Birth) | 3.3 kg | 3.2 kg | 49.9 cm | 49.1 cm |
| 6 Months | 7.9 kg | 7.3 kg | 67.6 cm | 65.7 cm |
| 12 Months | 9.6 kg | 8.9 kg | 75.7 cm | 74.0 cm |
| 18 Months | 10.9 kg | 10.2 kg | 82.3 cm | 80.7 cm |
| 24 Months | 12.2 kg | 11.5 kg | 87.8 cm | 86.4 cm |
| 36 Months | 14.3 kg | 13.9 kg | 96.1 cm | 95.1 cm |