Normal weight for 4 month olds (kg)



The average weight for 4 month old baby boys is 7 kg and 4 month old baby girls average 6.4 kg1 The tables below show the distribution of weight by percentile of the 4 month year old population.

Current units = kilograms. View this page in pounds.

Body weight percentile table for 4 month old baby boys

Percentile Weight
3rd 5.6 kg
5th 5.7 kg
10th 6 kg
25th 6.5 kg
50th 7 kg
75th 7.6 kg
90th 8.2 kg
95th 8.6 kg
97th 8.8 kg

Body weight percentile table for 4 month old baby girls

Percentile Weight
3rd 5.1 kg
5th 5.2 kg
10th 5.5 kg
25th 5.9 kg
50th 6.4 kg
75th 7 kg
90th 7.5 kg
95th 7.8 kg
97th 8 kg


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?


Change age

-1 mo +1 mo