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©2013 UpToDate ® Print Email Body composition of healthy children Gender Race/ethnicity Age (years) Height (cm) Weight (kg) Fat-free mass (kg) Fat mass (kg) Female Multiracial Birth 50 3.3 2.8 0.5 0.5 66 7 5.1 1.9 1 74 9 6.8 2.2 2 85 12 9.6 2.4 Caucasian 4 107 18 14 4 8 127 28 20 7 12 151 44 30 12 16 164 56 38 15 African-American 4 106 18 14 4 8 133 33 23 9 12 157 54 36 16 16 162 63 40 21 Hispanic 4 106 19 14 4 8 124 30 19 8 12 153 57 32 17 16 161 67 39 25 Male Multiracial Birth 52 3.5 3.0 0.5 0.5 68 8 6.0 2.0 1 76 10 7.8 2.2 2 87 13 10.5 2.5 Caucasian 4 103 17 13 3 8 126 26 20 5 12 157 52 38 12 16 174 67 54 10 African-American 4 105 18 15 2 8 127 29 23 4 12 161 60 46 13 16 176 83 66 8 Hispanic 4 99 16 12 1 8 127 30 21 4 12 158 56 39 9 16 172 69 54 6 Data from: 1. Fomon SJ, Haschke F, Ziegler EE, Nelson SE. Am J Clin Nutr 1982; 35:1169. 2. Ellis KJ, Abrams SA, Wong WW. Am J Clin Nutr 1997; 65:724. 3. Ellis KJ. Am J Clin Nutr 1997; 66:1323.