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)

Wistar

WKSMALE (g)RANGE (g)FEMALE (g)RANGE (g)
377 +/- 766 - 9662 +/- 650 - 75
4122 +/- 9105 - 14960 +/- 1039 - 81
5178 +/- 12160 - 21593 +/- 1165 - 119
6225 +/- 15204 - 271117 +/- 1192 - 147
7273 +/- 21249 - 337136 +/- 11113 - 170
8305 +/- 26274 - 375156 +/- 12131 - 191
9327 +/- 13308 - 347172 +/- 13141 - 213
10352 +/- 16328 - 371184 +/- 14152 - 225
11376 +/- 18347 - 398191 +/- 14164 - 237
12389 +/- 17363 - 409201 +/- 15172 - 248

Sprague Dawley

WKSMALE (g)RANGE (g)FEMALE (g)RANGE (g)
345 +/- 534 - 5540 +/- 432 - 49
477 +/- 860 - 9268 +/- 656 - 78
5123 +/- 1194 - 147107 +/- 1091 - 124
6176 +/- 14137 - 207143 +/- 11126 - 165
7229 +/- 17181 - 266168 +/- 11149 - 196
8280 +/- 18229 - 328191 +/- 13169 - 224
9326 +/- 23269 - 376210 +/- 14181 - 238
10365 +/- 27305 - 427226 +/- 16192 - 263
11402 +/- 32338 - 474240 +/- 18211 - 282
12425 +/- 34367 - 492252 +/- 18219 - 291

Average and Range of Weights (g) of Commonly Used Strains of Mice*

StrainSex21 DAYS42 DAYS56 DAYS84 DAYS
MICEAVRANGE (g)AVRANGE (g)AVRANGE (g)AVRANGE (g)
A/JM107.9 - 13.91714.8 - 19.72018.0 - 22.82421.1 - 26.6
F86.0 - 10.81513.0 - 17.81714.1 - 19.91916.5 - 21.6
BALB/cM109.0 - 11.01915.0 - 21.02118.0 - 24.02926.5 - 32.0
F98.0 - 10.01511 - 201714.0 - 21.02321.0 - 25.3
CBA/CaHM86.3 - 9.52017.5 - 22.22220.0 - 24.43122.0 - 34.0
F86.2 - 8.61713.1 - 19.11816.0 - 19.12721.0 - 30.0
C57BL/6JM86.0 - 10.01916.0 - 21.02321.0 - 25.02519.6 - 31.0
F76.0 - 10.01615.0 - 18.01816.0 - 19.02318.5 - 30.7
C3H/HeJM77.3 - 12.61916.5 - 22.12219.9 - 25.63224.0 - 37.3
F95.9 - 11.11614.3 - 17.81714.7 - 19.53126.5 - 33.5
DBA/2M96.8 - 11.02112.9 - 24.42414.8 - 28.82719.7 - 31.6
F97.2 - 10.61812.1 - 20.12015.5 - 22.22520.0 - 31.4
SJL/JM127.6 - 16.01916.0 - 21.02017.7 - 22.62824.5 - 31.5
F107.5 - 12.81615.0 - 17.71816.0 - 20.32518.0 - 27.5
B6D2F1M96.0 - 12.02220.0 - 27.02624.0 - 28.03024.0 - 34.0
F95.0 - 10.01916.0 - 22.02120.0 - 24.02320.0 - 25.0

Average and Range of Weights (g) of Rats held at the ARC*

STRAINSEX21 DAYS42 DAYS56 DAYS84 DAYS
RATSAVRANGEAVRANGEAVRANGEAVRANGE
BNM4532.0 - 54.0124102.0 - 153.0193163.5 - 210.0264220.0 - 311.0
F4430.0 - 52.59787.0 - 117.5129109.0 - 147.0167147.0 - 180.0
F344M3124.0 - 39.010589.7 - 133.0181155.0 - 209.0206182.7 - 238.0
F3022.2 - 38.78661.5 - 110.0126105.0 - 156.0206182.7 - 238.0
SDM5730.0 - 75.0163128.0 - 195.0225197.0 - 256.0356328.0 - 434.0
F4737.0 - 55.0138124.0 - 157.0188177.0 - 217.0247230.8 - 282.6
SHR/NM3527.0 - 43.0141123.0 - 158.0218193.0 - 243.0294261.0 - 328.0
F3626.0 - 46.0116101.0 - 132.0149134.0 - 165.0186167.0 - 206.0
WFM4037.0 - 41.49124.2 - 115.0157140.9 - 172.3240195.2 - 269.3
F3935.0 - 42.07661.3 - 90.5137130.1 - 140.2175153.4 - 189.1
WKYM3824.0 - 52.0132104.0 - 159.0217182.0 - 252.0291258.0 - 324.0
F3624.0 - 48.011394.0 - 133.0159139.0 - 178.0208185.0 - 232.0
* From yearly updated growth charts.