Normal weight for 4 month olds (lbs)



The average weight for 4 month old baby boys is 15.5 lbs and 4 month old baby girls average 14.2 lbs1 The tables below show the distribution of weight by percentile of the 4 month year old population.

Current units = pounds. View this page in kilograms.

Body weight percentile table for 4 month old baby boys

Percentile Weight
3rd 12.3 lbs
5th 12.7 lbs
10th 13.3 lbs
25th 14.3 lbs
50th 15.5 lbs
75th 16.8 lbs
90th 18.1 lbs
95th 18.9 lbs
97th 19.4 lbs

Body weight percentile table for 4 month old baby girls

Percentile Weight
3rd 11.1 lbs
5th 11.5 lbs
10th 12.1 lbs
25th 13.1 lbs
50th 14.2 lbs
75th 15.4 lbs
90th 16.4 lbs
95th 17.1 lbs
97th 17.5 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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