Rat and Mice Weights
Average and Range Weights
Male and Female Wistar and Sprague Dawley Rats from 3 to 12 Weeks held at ARC (updated yearly)
Average and Range of Weights (g) of Commonly Used Strains of Mice*
| Strain | Sex | 21 DAYS | 42 DAYS | 56 DAYS | 84 DAYS |
| MICE | | AV | RANGE (g) | AV | RANGE (g) | AV | RANGE (g) | AV | RANGE (g) |
| A/J | M | 10 | 7.9 - 13.9 | 17 | 14.8 - 19.7 | 20 | 18.0 - 22.8 | 24 | 21.1 - 26.6 |
| F | 8 | 6.0 - 10.8 | 15 | 13.0 - 17.8 | 17 | 14.1 - 19.9 | 19 | 16.5 - 21.6 |
| BALB/c | M | 10 | 9.0 - 11.0 | 19 | 15.0 - 21.0 | 21 | 18.0 - 24.0 | 29 | 26.5 - 32.0 |
| F | 9 | 8.0 - 10.0 | 15 | 11.0 - 20.0 | 17 | 14.0 - 21.0 | 23 | 21.0 - 25.3 |
| CBA/CaH | M | 8 | 6.3 - 9.5 | 20 | 17.5 - 22.2 | 22 | 20.0 - 24.4 | 31 | 22.0 - 34.0 |
| F | 8 | 6.2 - 8.6 | 17 | 13.1 - 19.1 | 18 | 16.0 - 19.1 | 27 | 21.0 - 30.0 |
| C57BL/6J | M | 8 | 6.0 - 10.0 | 21 | 18.0 - 23.0 | 23 | 21.0 - 25.0 | 27 | 24 - 29.0 |
| F | 7 | 6.0 - 10.0 | 15 | 12.6 - 17.1 | 18 | 16.0 - 19.0 | 20 | 18.0 - 22.0 |
| DBA/2 | M | 9 | 6.8 - 11.0 | 21 | 12.9 - 24.4 | 24 | 14.8 - 28.8 | 27 | 19.7 - 31.6 |
| F | 9 | 7.2 - 10.6 | 18 | 12.1 - 20.1 | 20 | 15.5 - 22.2 | 25 | 20.0 - 31.4 |
| SJL/J | M | 12 | 7.6 - 16.0 | 19 | 16.0 - 21.0 | 20 | 17.7 - 22.6 | 28 | 24.5 - 31.5 |
| F | 10 | 7.5 - 12.8 | 16 | 15.0 - 17.7 | 18 | 16.0 - 20.3 | 25 | 18.0 - 27.5 |
| B6D2F1 | M | 9 | 6.0 - 12.0 | 22 | 20.0 - 27.0 | 26 | 24.0 - 28.0 | 30 | 24.0 - 34.0 |
| F | 9 | 5.0 - 10.0 | 19 | 16.0 - 22.0 | 21 | 20.0 - 24.0 | 23 | 20.0 - 25.0 |
* Please note: All weights given are an approximation only. If weights are critical, please place an order for weights only. Additional charges will apply.
Average and Range of Weights (g) of Rats held at the ARC*
| STRAIN | SEX | 21 DAYS | 42 DAYS | 56 DAYS | 84 DAYS |
| RATS | | AV | RANGE | AV | RANGE | AV | RANGE | AV | RANGE |
| BN | M | 45 | 32.0 - 54.0 | 124 | 102.0 - 153.0 | 193 | 163.5 - 210.0 | 264 | 220.0 - 311.0 |
| F | 44 | 30.0 - 52.5 | 97 | 87.0 - 117.5 | 129 | 109.0 - 147.0 | 167 | 147.0 - 180.0 |
| F344 | M | 31 | 24.0 - 39.0 | 105 | 89.7 - 133.0 | 181 | 155.0 - 209.0 | 206 | 182.7 - 238.0 |
| F | 30 | 22.2 - 38.7 | 86 | 61.5 - 110.0 | 126 | 105.0 - 156.0 | 206 | 182.7 - 238.0 |
| SD | M | 45 | 34-55 | 229 | 181-266 | 280 | 229-328 | 425 | 367.0-492.0 |
| F | 40 | 32.0 - 49.0 | 168 | 149.0 - 196.0 | 191 | 169.0 - 224.0 | 252 | 219.0 - 291.0 |
| SHR/N | M | 35 | 27.0 - 43.0 | 141 | 123.0 - 158.0 | 218 | 193.0 - 243.0 | 294 | 261.0 - 328.0 |
| F | 36 | 26.0 - 46.0 | 116 | 101.0 - 132.0 | 149 | 134.0 - 165.0 | 186 | 167.0 - 206.0 |
| WKY | M | 38 | 24.0 - 52.0 | 132 | 104.0 - 159.0 | 217 | 182.0 - 252.0 | 291 | 258.0 - 324.0 |
| F | 36 | 24.0 - 48.0 | 113 | 94.0 - 133.0 | 159 | 139.0 - 178.0 | 208 | 185.0 - 232.0 |
| WISTAR | M | 77 | 66.0 - 96.0 | 273 | 249.0 - 337.0 | 305 | 274.0 - 375.0 | 389 | 363.0 - 409.0 |
| F | 62 | 50.0 - 75.5 | 136 | 113.0 - 170.0 | 156 | 131.0 - 191.0 | 201 | 172.0 - 248.0 |
* Please note: All weights given are an approximation only. If weights are critical, please place an order for weights only. Additional charges will apply.
| H-2a | A/J |
| H-2b | C57BL/6J, C57BL/10ScSn, 129/SvJ-ter |
| H-2d | BALB/c, DBA/2J, |
| H-2k | CBA/CaH, B10.BR |
| H-2q | DBA/1J, FVB |
| H-2s | SJL/J |
* From yearly updated growth charts.
