Weight chart for boys
The median and outer lines at each age. Open a row for the full percentile table, a chart and a CSV.
WHO 2006 · CDC 2000 · retrieved 2026-10-05Same chart for girls
| Age | Standard | Lower line | Median | Upper line | Median (imperial) |
|---|---|---|---|---|---|
| Birth | WHO | 2.46 kg (2nd) | 3.35 kg | 4.42 kg (98th) | 7 lb 6 oz |
| 1 month | WHO | 3.39 kg (2nd) | 4.47 kg | 5.80 kg (98th) | 9 lb 14 oz |
| 2 months | WHO | 4.32 kg (2nd) | 5.57 kg | 7.09 kg (98th) | 12 lb 4 oz |
| 3 months | WHO | 5.02 kg (2nd) | 6.38 kg | 8.02 kg (98th) | 14 lb 1 oz |
| 4 months | WHO | 5.56 kg (2nd) | 7.00 kg | 8.75 kg (98th) | 15 lb 7 oz |
| 5 months | WHO | 6.00 kg (2nd) | 7.51 kg | 9.34 kg (98th) | 16 lb 9 oz |
| 6 months | WHO | 6.35 kg (2nd) | 7.93 kg | 9.85 kg (98th) | 17 lb 8 oz |
| 7 months | WHO | 6.65 kg (2nd) | 8.30 kg | 10.29 kg (98th) | 18 lb 5 oz |
| 8 months | WHO | 6.91 kg (2nd) | 8.62 kg | 10.68 kg (98th) | 19 lb 0 oz |
| 9 months | WHO | 7.14 kg (2nd) | 8.90 kg | 11.04 kg (98th) | 19 lb 10 oz |
| 10 months | WHO | 7.36 kg (2nd) | 9.16 kg | 11.37 kg (98th) | 20 lb 3 oz |
| 11 months | WHO | 7.55 kg (2nd) | 9.41 kg | 11.69 kg (98th) | 20 lb 12 oz |
| 12 months | WHO | 7.74 kg (2nd) | 9.65 kg | 11.99 kg (98th) | 21 lb 4 oz |
| 13 months | WHO | 7.92 kg (2nd) | 9.87 kg | 12.28 kg (98th) | 21 lb 12 oz |
| 14 months | WHO | 8.10 kg (2nd) | 10.10 kg | 12.56 kg (98th) | 22 lb 4 oz |
| 15 months | WHO | 8.27 kg (2nd) | 10.31 kg | 12.84 kg (98th) | 22 lb 12 oz |
| 16 months | WHO | 8.43 kg (2nd) | 10.52 kg | 13.11 kg (98th) | 23 lb 3 oz |
| 17 months | WHO | 8.59 kg (2nd) | 10.73 kg | 13.38 kg (98th) | 23 lb 11 oz |
| 18 months | WHO | 8.75 kg (2nd) | 10.94 kg | 13.66 kg (98th) | 24 lb 2 oz |
| 19 months | WHO | 8.91 kg (2nd) | 11.14 kg | 13.93 kg (98th) | 24 lb 9 oz |
| 20 months | WHO | 9.07 kg (2nd) | 11.35 kg | 14.19 kg (98th) | 25 lb 0 oz |
| 21 months | WHO | 9.22 kg (2nd) | 11.55 kg | 14.46 kg (98th) | 25 lb 7 oz |
| 22 months | WHO | 9.37 kg (2nd) | 11.75 kg | 14.74 kg (98th) | 25 lb 14 oz |
| 23 months | WHO | 9.52 kg (2nd) | 11.95 kg | 15.01 kg (98th) | 26 lb 6 oz |
| 2 years | CDC 2000 | 10.38 kg (3rd) | 12.67 kg | 15.60 kg (97th) | 27 lb 15 oz |
| 3 years | CDC 2000 | 11.76 kg (3rd) | 14.33 kg | 17.94 kg (97th) | 31 lb 9 oz |
| 4 years | CDC 2000 | 13.23 kg (3rd) | 16.23 kg | 20.87 kg (97th) | 35 lb 13 oz |
| 5 years | CDC 2000 | 14.79 kg (3rd) | 18.39 kg | 24.31 kg (97th) | 40 lb 9 oz |
| 6 years | CDC 2000 | 16.43 kg (3rd) | 20.68 kg | 28.10 kg (97th) | 45 lb 9 oz |
| 7 years | CDC 2000 | 18.18 kg (3rd) | 23.07 kg | 32.34 kg (97th) | 50 lb 14 oz |
| 8 years | CDC 2000 | 20.04 kg (3rd) | 25.64 kg | 37.20 kg (97th) | 56 lb 8 oz |
| 9 years | CDC 2000 | 21.99 kg (3rd) | 28.55 kg | 42.82 kg (97th) | 62 lb 15 oz |
| 10 years | CDC 2000 | 24.10 kg (3rd) | 31.94 kg | 49.14 kg (97th) | 70 lb 6 oz |
| 11 years | CDC 2000 | 26.49 kg (3rd) | 35.89 kg | 55.97 kg (97th) | 79 lb 2 oz |
| 12 years | CDC 2000 | 29.34 kg (3rd) | 40.47 kg | 63.01 kg (97th) | 89 lb 4 oz |
| 13 years | CDC 2000 | 32.81 kg (3rd) | 45.59 kg | 69.99 kg (97th) | 100 lb 8 oz |
| 14 years | CDC 2000 | 36.89 kg (3rd) | 51.00 kg | 76.69 kg (97th) | 112 lb 7 oz |
| 15 years | CDC 2000 | 41.34 kg (3rd) | 56.28 kg | 82.99 kg (97th) | 124 lb 1 oz |
| 16 years | CDC 2000 | 45.63 kg (3rd) | 60.92 kg | 88.73 kg (97th) | 134 lb 5 oz |
| 17 years | CDC 2000 | 49.16 kg (3rd) | 64.57 kg | 93.60 kg (97th) | 142 lb 6 oz |
| 18 years | CDC 2000 | 51.61 kg (3rd) | 67.20 kg | 97.13 kg (97th) | 148 lb 2 oz |
| 19 years | CDC 2000 | 53.17 kg (3rd) | 69.12 kg | 99.13 kg (97th) | 152 lb 6 oz |
| 20 years | CDC 2000 | 54.00 kg (3rd) | 70.60 kg | 100.78 kg (97th) | 155 lb 10 oz |