Baby Growth Tracker
See how your baby is growing compared to WHO standards. Track weight, length, and head circumference.
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WHO Growth Chart
Interactive percentile bands for girls aged 0-24 months
Understanding Percentiles
What does "Xth percentile" mean?
If your baby is at the 60th percentile for weight, it means that out of 100 babies of the same age and sex, your baby weighs more than approximately 60 of them. It does not mean your baby scored "60%" on a test -- there is no passing or failing.
Example: a baby at the 50th percentile (median)
Is my baby's percentile "normal"?
The entire range from the 3rd to the 97th percentile is considered normal. A baby at the 5th percentile is just as healthy as one at the 90th. What matters most is that your baby follows their own growth curve consistently over time.
When to consult your doctor
- A sudden drop or rise crossing two or more percentile lines
- Consistently below the 3rd or above the 97th percentile
- Weight-for-length is significantly different from weight-for-age
- Your baby appears unwell, feeding poorly, or not meeting milestones
Growth Milestones
Quick reference for typical growth patterns
Birth Weight Doubles
By ~5 months
Most babies double their birth weight by around 4-5 months of age. If birth weight was 3.3 kg, expect around 6.6 kg.
Birth Weight Triples
By ~12 months
By their first birthday, babies typically triple their birth weight. A 3.3 kg newborn will weigh about 10 kg.
Length Increases 50%
By ~12 months
A baby born at 50 cm will grow to about 75 cm by their first birthday -- a remarkable 50% increase in length.
Head Growth Rapid
First 12 months
Head circumference grows about 12 cm in the first year (from ~35 cm to ~47 cm), reflecting rapid brain development.
Medical Disclaimer
This tool provides estimates based on WHO growth standards and is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your paediatrician for concerns about your baby's growth and development. Growth charts are population-based references and individual variation is expected.
All calculations happen in your browser. No baby data is sent to any server or stored anywhere. Your baby's measurements remain completely private.
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