Baby Growth Percentile Calculator
Understand your baby's development by comparing weight and height measurements with WHO international standards.
What are Growth Percentiles?
Growth percentiles are a way of checking how your baby's growth compares to other babies of the same age and gender. For example, if your baby is in the 75th percentile for weight, it means they are heavier than 75% of babies their age and lighter than 25%.
The Average: This doesn't mean "perfect"—it simply means half of babies are larger and half are smaller.
90th+ Percentile: Your baby is larger than most peers, which is often perfectly normal and genetic.
Tracking the Curve
What's more important than a single measurement is the trend over time. Most healthy babies will follow their own growth curve relatively consistently.
- Consistent growth is better than high numbers
- Minor fluctuations are common during growth spurts
- Doctors look for major drops across multiple curves
Common Questions
Fast answers for curious parents.
Which chart should I use?
We use the World Health Organization (WHO) standards, which are recommended for all babies from birth to age 2, regardless of how they are fed.
Are higher numbers better?
Not necessarily. A baby in the 5th percentile can be just as healthy as a baby in the 95th. Genetics and activity levels play huge roles.
What about head size?
Head circumference is a third vital metric doctors track. This calculator focuses on weight and height, the primary physical growth indicators.