Head Circumference Result
38.5th Percentile
Age (months): 6
Head circumference: 43 cm (43.0 cm)
Z-score: -0.29
Baby Head Circumference Calculator
Track your baby's head growth percentile using reliable WHO/CDC charts. Monitor brain development.
Result
About Head Circumference
Head circumference is an important indicator of brain growth and development. Consistent measurements over time provide the best assessment of healthy development.
Parent guide
How to use this tool
Track your baby's head growth percentile using reliable WHO/CDC charts. Monitor brain development.
How to use
- Enter Baby's sex, Age, Current head circumference in Baby Head Circumference Calculator. Use the freshest measurement you have, ideally from the same day or clinic visit.
- Confirm units, dates, and reference choices before calculating. Small age or unit differences can change a percentile, schedule, or range.
- Use the contextual links below to compare this result with Baby Weight Percentile Calculator, Baby Height Percentile Calculator, Baby Developmental Milestone Checker, so one number is read alongside the wider care picture.
What the result means
Baby Head Circumference Calculator turns the form inputs into an educational estimate for this question: Track your baby's head growth percentile using reliable WHO/CDC charts. Monitor brain development. It is most useful as a snapshot for tracking patterns between visits, not as a diagnosis.
References and data notes
- WHO/CDC growth chart concepts for age, sex, percentile, and z-score comparisons.
- LMS-style percentile interpretation, where trends over time matter more than one isolated point.
Safety note
Use this result for planning and discussion. Contact a qualified healthcare professional for unusual growth changes, feeding difficulty, fever, missed vaccines, developmental concerns, or urgent symptoms.
Next tools to compare
Baby Weight Percentile CalculatorCalculate your baby's weight percentile using WHO or CDC growth charts. See if your baby is growing on track.Baby Height Percentile CalculatorDetermine your baby's height percentile based on WHO or CDC growth charts. Track your baby's growth.Baby Developmental Milestone CheckerCheck which developmental milestones your baby should reach at this age.
Frequently asked questions
Why might Baby Head Circumference Calculator differ from a clinic visit?
Home measurements, rounding, age calculation, units, and reference choices can all shift the result. Use the same measurement method over time and bring concerns to your pediatrician.
What should I compare with this result?
Compare it with Baby Weight Percentile Calculator, Baby Height Percentile Calculator, Baby Developmental Milestone Checker, recent trends, feeding or sleep notes, and your child's usual behavior. A steady pattern is usually more informative than one isolated value.