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Normal height in cm for North American (USA) boys of age (in months) between birth and 18 years old. The blue line represents the mean value (50th percentile), while the upper red line represents the 90th percentile, and the lower red line the 10th percentile.
Value labels above the middle line are rounded to the cm. Values with two decimals are given in the table below.
| Age (Month) | Height (cm) | ||
|---|---|---|---|
| 10th Percentile | 50th Percentile | 90th Percentile | |
| Birth | 47.50 | 50.50 | 53.50 |
| 1 | 51.30 | 54.60 | 57.70 |
| 3 | 57.70 | 61.10 | 64.50 |
| 6 | 64.40 | 67.80 | 71.30 |
| 9 | 69.10 | 72.30 | 75.90 |
| 12 | 72.80 | 76.10 | 79.80 |
| 18 | 78.70 | 82.40 | 86.60 |
| 24 | 83.50 | 86.80 | 92.00 |
| 30 | 86.50 | 90.40 | 95.60 |
| 36 | 90.30 | 94.90 | 100.10 |
| 42 | 93.90 | 99.10 | 104.30 |
| 48 | 97.30 | 102.90 | 108.20 |
| 54 | 100.60 | 106.60 | 111.90 |
| 60 | 103.70 | 109.90 | 115.40 |
| 66 | 106.70 | 113.10 | 118.70 |
| 72 | 109.60 | 116.10 | 121.90 |
| 78 | 112.30 | 119.00 | 124.90 |
| 84 | 115.00 | 121.70 | 127.90 |
| 90 | 117.60 | 124.40 | 130.80 |
| 96 | 120.20 | 127.00 | 133.60 |
| 102 | 122.70 | 129.60 | 136.50 |
| 108 | 125.20 | 132.20 | 139.40 |
| 114 | 127.60 | 134.80 | 142.40 |
| 120 | 130.10 | 137.50 | 145.50 |
| 126 | 132.60 | 140.30 | 148.70 |
| 132 | 135.10 | 143.30 | 152.10 |
| 138 | 137.70 | 146.40 | 155.60 |
| 144 | 140.30 | 149.70 | 159.40 |
| 150 | 143.00 | 153.00 | 163.20 |
| 156 | 145.80 | 156.50 | 167.00 |
| 162 | 148.70 | 159.90 | 170.50 |
| 168 | 151.80 | 163.10 | 173.80 |
| 174 | 155.00 | 166.20 | 176.60 |
| 180 | 158.20 | 169.00 | 178.90 |
| 186 | 161.20 | 171.50 | 180.80 |
| 192 | 163.90 | 173.50 | 182.40 |
| 198 | 166.10 | 175.20 | 183.60 |
| 204 | 167.70 | 176.20 | 184.40 |
| 210 | 168.50 | 176.70 | 185.00 |
| 216 | 168.70 | 176.80 | 185.30 |