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MathBaby Percentile Calculator
Calculate baby growth percentiles for length, weight, and head circumference using WHO standards. Track infant development from 0-36 months.
Understanding Percentiles
Percentiles show how your baby compares to others of the same age and gender. For example, if your baby is in the 60th percentile for weight, 60% of babies the same age weigh less.
| Percentile | Interpretation |
|---|---|
| < 3rd | Below 3rd percentile |
| 3rd - 15th | Below average |
| 15th - 85th | Average |
| 85th - 97th | Above average |
| > 97th | Above 97th percentile |
Important: These percentiles are screening tools. If you have concerns about your baby's growth, always consult with a pediatrician.
What are Baby Percentiles?
Baby percentiles are based on WHO Child Growth Standards and show how your baby's measurements compare to other babies of the same age and gender. These standards represent optimal growth under ideal conditions and are used worldwide by pediatricians.
Three Key Measurements
- Length/Height: Measured lying down (length) for babies under 2, standing (height) for toddlers over 2. Indicates skeletal growth.
- Weight: Important indicator of nutrition and overall health. Weight should be tracked in relation to length.
- Head Circumference: Indicates brain development. Most rapid growth occurs in the first year of life.
Why Track Growth Percentiles?
- Monitor healthy development over time
- Identify potential growth concerns early
- Ensure adequate nutrition
- Track response to dietary changes or medical interventions
- Compare with standardized population data
Tips for Accurate Measurements
- Measure length/height without shoes and with baby lying flat
- Weigh baby without clothes or diaper
- Measure head circumference around the largest part of the head
- Take measurements at the same time of day when possible
- Have a healthcare professional verify measurements periodically