Normal weight for 12 month olds (lbs)

The average weight for 12 month old baby boys is 23.1 lbs and 12 month old baby girls average 21.3 lbs1 The tables below show the distribution of weight by percentile of the 12 month year old population.

Current units = pounds. View this page in kilograms.

12 month old girls under 18 lbs or over 24 lbs and 12 month old boys who weigh less than 19 lbs or more than 27 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 12 month old baby boys

Percentile Weight
3rd 18.8 lbs
5th 19.3 lbs
10th 20.1 lbs
25th 21.4 lbs
50th 23.1 lbs
75th 24.8 lbs
90th 26.6 lbs
95th 27.7 lbs
97th 28.5 lbs

Body weight percentile table for 12 month old baby girls

Percentile Weight
3rd 17.5 lbs
5th 17.9 lbs
10th 18.6 lbs
25th 19.8 lbs
50th 21.3 lbs
75th 22.9 lbs
90th 24.5 lbs
95th 25.5 lbs
97th 26.1 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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