Normal weight for 6 month olds (lbs)

The average weight for 6 month old baby boys is 18 lbs and 6 month old baby girls average 16.4 lbs1 The tables below show the distribution of weight by percentile of the 6 month year old population.

Current units = pounds. View this page in kilograms.

6 month old girls under 14 lbs or over 19 lbs and 6 month old boys who weigh less than 15 lbs or more than 21 lbs may want to consult with a doctor. The American Academy of Pediatrics recommends that children who's weight is outside the 5th or 85th percentiles seek professional advice to determine if further evaluation is needed2.

Body weight percentile table for 6 month old baby boys

Percentile Weight
3rd 14.5 lbs
5th 14.9 lbs
10th 15.5 lbs
25th 16.6 lbs
50th 18 lbs
75th 19.5 lbs
90th 20.9 lbs
95th 21.8 lbs
97th 22.4 lbs

Body weight percentile table for 6 month old baby girls

Percentile Weight
3rd 13.1 lbs
5th 13.5 lbs
10th 14.1 lbs
25th 15.2 lbs
50th 16.4 lbs
75th 17.7 lbs
90th 19 lbs
95th 19.7 lbs
97th 20.2 lbs

Source Citations

  1. Robert J. Kuczmarski Dr.P.H. et al., Centers for Disease Control and Prevention, U.S. Department of Health & Human Services 2000 CDC Growth Charts for the United States: Methods and Development
  2. American Academy of Pediatrics Is Your Child Overweight?

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