Weight Percentile Calculator for Children (Ages 2-20)

Your details

CDC growth charts are sex-specific because boys and girls grow at different rates.
Whole years of age. Add months in the field below if needed.
yr
Extra months beyond the full years (0-11).
mo
Current body weight in the selected unit.
kg
Weight percentileHealthy weight
43.4%

Percentage of same-age, same-sex children with a lower weight

Z-score-0.17
Median weight for age25.6
5th percentile weight20.6
95th percentile weight35.1
Clinical categoryHealthy weight (5th to 84th percentile)
43.4 %37.2% below · Percentile

Weight is at the 43rd percentile - Healthy weight.

  • The median weight for a 8 yr-old boy is 25.6 kg. Your child is at the 43rd.
  • The typical range (5th to 95th percentile) for this age and sex is 20.6 to 35.1 kg.
  • The z-score of -0.17 means the child's weight is 0.17 standard deviations below the median for their age and sex.
  • Weight percentile is one part of a broader growth assessment. Tracking the trend across visits matters more than any single reading.

Next stepContinue monitoring at routine well-child visits. A single healthy percentile reading is encouraging, but the growth trend over time is what clinicians watch most closely.

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