How old is your hamster in human years? Average hamster lifespan is just 2–3 years.
Hamsters age extremely quickly. A 1-year-old hamster is roughly middle-aged in human terms. At 2 years, many hamsters show signs of old age. Syrian hamsters are the longest-lived common pet hamster (2–2.5 years). Roborovski dwarfs can reach 3–3.5 years.