Rat lifespan and age in human years
Longest recorded 4.2 years
🏆 The longest-lived rat on record reached 4.2 years in captivity.
Rat (Rattus rattus). The oldest known individual lived 4.2 years; this chart maps that record to a human age of 120. Most individuals live considerably shorter lives than the record.
- Reaches adulthood at about 3 months
- Adult weight about 200 g
- Gestation about 22 days
- About 7.3 young at a time
How old in human years?
Age
Rat age chart in human years
Shaded rows are equivalent to human age 60+.
| Rat | Human age | Stage |
|---|---|---|
| 6 mo | 25 | Adult |
| 1 yr | 37 | Adult |
| 1 yr 6 mo | 50 | Middle age |
| 2 yr | 63 | Senior |
| 2 yr 6 mo | 76 | Elderly |
| 3 yr | 89 | Elderly |
| 3 yr 6 mo | 102 | Elderly |
| 4 yr | 115 | Elderly |
Rat profile
| Classification | Mammalia > Rodentia > Muridae |
|---|---|
| Scientific name | Rattus rattus |
| Adult weight | about 2e+02 g |
| Age of maturity | 3 months |
| Gestation | about 22 days |
| Litter / clutch size | 7.3 |
| Longest recorded | 4.2 years (captivity) |
Sources
How we convert ages: method.
More Wild & zoo animals
Asian elephantLifespan about 47 years
African bush elephantLifespan about 56 years
GiraffeLifespan about 18 years
LionLifespan about 17 years
TigerLifespan about 16 years
Giant pandaLifespan about 25 years
Red pandaLifespan about 10 years
GorillaLifespan about 35 years
ChimpanzeeLifespan about 40 years
OrangutanLifespan about 30 years
Japanese macaqueLifespan about 25 years
HippopotamusLifespan about 36 years