II. Physiology

  1. Weight is best assessment of nutrition and growth

III. Exam: Normal Weight Increases

  1. Birth Weight
    1. Weight doubles by 4-5 months of age
    2. Weight triples by 1 year of age
    3. Weight quadruples by 2 years of age
  2. Annual increase (Ages 2-9): 5 lb/year (2.25 kg/year)

IV. Exam: Normal Weight in boys (range: 3% to 97%)

  1. Age 1 year: 21-32 lbs, mean: 10 kg (22 lb)
  2. Age 2 years: 23-35 lbs, mean: 13 kg (28 lb)
  3. Age 3 years: 27-39 lbs, mean: 15 kg (33 lb)
  4. Age 4 years: 30-43 lbs, mean: 17 kg (37 lb)
  5. Age 5 years: 34-52 lbs, mean: 19 kg (42 lb)
  6. Age 6 years: 39-61 lbs, mean: 21 kg (46 lb)
  7. Age 7 years: 43-70 lbs, mean: 23 kg (51 lb)
  8. Age 8 years: 48-79 lbs, mean: 25 kg (55 lb)
  9. Age 9 years: 53-90 lbs, mean: 28 kg (62 lb)
  10. Age 10 years: 57-100 lbs, mean: 31 kg (68 lb)
  11. Age 11 years: 62-112 lbs, mean: 35 kg (77 lb)
  12. Age 12 years: 67-124 lbs, mean: 40 kg (88 lb)
  13. Age 13 years: 72-138 lbs, mean: 45 kg (99 lb)
  14. Age 14 years: 80-151 lbs, mean: 51 kg (112 lb)
  15. Age 15 years: 91-162 lbs, mean: 57 kg (125 lb)
  16. Age 16 years: 103-171 lbs, mean: 62 kg (136 lb)
  17. Age 17 years: 111-176 lbs, mean: 136 lbs
  18. Age 18 years: 69 kg (152 lb)

V. Exam: Normal Weight in Girls (range: 3% to 97%)

  1. Birth: 5.8-9.4 lbs, mean: 3 kg (7 lb)
  2. Age 1 year: 17-27 lbs, mean: 10 kg (22 lb)
  3. Age 2 years: 22-34 lbs, mean: 12 kg (27 lb)
  4. Age 3 years: 26-42 lbs, mean: 15 kg (32 lb)
  5. Age 4 years: 29-48 lbs, mean: 16 kg (36 lb)
  6. Age 5 years: 33-52 lbs, mean: 19 kg (41 lb)
  7. Age 6 years: 37-59 lbs, mean: 21 kg (47 lb)
  8. Age 7 years: 41-67 lbs, mean: 24 kg (52 lb)
  9. Age 8 years: 45-79 lbs, mean: 26 kg (58 lb)
  10. Age 9 years: 49-90 lbs, mean: 29 kg (64 lb)
  11. Age 10 years: 53-102 lbs, mean: 32 kg (70 lb)
  12. Age 11 years: 58-113 lbs, mean: 36 kg (79 lb)
  13. Age 12 years: 64-128 lbs, mean: 40 kg (88 lb)
  14. Age 13 years: 72-142 lbs, mean: 45 kg (99 lb)
  15. Age 14 years: 83-151 lbs, mean: 49 kg (108 lb)
  16. Age 15 years: 89-155 lbs, mean: 52 kg (114 lb)
  17. Age 16 years: 92-158 lbs, mean: 53 kg (117 lb)
  18. Age 17 years: 94-160 lbs, mean: 54 kg (119 lb)

VI. Resources

  1. WHO updated growth charts (predominantly Breast fed infants, data from 6 countries)
    1. http://www.who.int/childgrowth
  2. New CDC Growth Charts reflecting Body Mass Index (typically heavier than WHO cohorts)
    1. http://www.cdc.gov/growthcharts

Images: Related links to external sites (from Google)