Baby Weight Percentile Calculator

Calculate your baby's weight percentile using WHO or CDC growth charts. See if your baby is growing on track.

Growth Assessment Results

Your Baby · Growth Status

18.4th Percentile

Below Average

Age: 6.0 months

Weight: 7.20 kg (7.2 kg)

Z-score: -0.90

Recommendation

Continue regular monitoring as part of routine care

About Percentiles

Percentiles show how your baby's weight compares to other babies of the same age and sex. For example, being in the 75th percentile means your baby weighs more than 75% of babies their age.

Growth Chart Visualization

Calculating...

Parent guide

How to use this tool

Calculate your baby's weight percentile using WHO or CDC growth charts. See if your baby is growing on track.

How to use

Enter Baby's sex, Age, Current weight, Reference chart, WHO (World Health Organization) in Baby Weight Percentile 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 Height Percentile Calculator, Baby Head Circumference Calculator, Baby BMI & Weight-for-Length Calculator, so one number is read alongside the wider care picture.

What the result means

Baby Weight Percentile Calculator turns the form inputs into an educational estimate for this question: Calculate your baby's weight percentile using WHO or CDC growth charts. See if your baby is growing on track. 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 Height Percentile CalculatorDetermine your baby's height percentile based on WHO or CDC growth charts. Track your baby's growth.Baby Head Circumference CalculatorTrack your baby's head growth percentile using reliable WHO/CDC charts. Monitor brain development.Baby BMI & Weight-for-Length CalculatorCheck your baby's BMI and weight-for-length percentile using CDC/WHO charts.

Frequently asked questions

Why might Baby Weight Percentile 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 Height Percentile Calculator, Baby Head Circumference Calculator, Baby BMI & Weight-for-Length Calculator, recent trends, feeding or sleep notes, and your child's usual behavior. A steady pattern is usually more informative than one isolated value.