Cat Age Calculator
How old is your cat in human years?
3 years
1 20 years
Human years
28 years
Adult
Your cat is in their prime — independent, confident, and full of character.
years → Human Years
How do you calculate a cat's age in human years?
The first year of a cat's life equals about 15 human years. The second year adds about 9 more, and each year after that counts as roughly 4 human years.
How old is a 5-year-old cat in human years?
A 5-year-old cat is approximately 36 human years old (15 + 9 + 4 + 4 + 4).
At what age is a cat considered senior?
Cats are generally considered senior from about 7 years of age, which is equivalent to roughly 44 human years.
Do indoor cats age differently than outdoor cats?
Indoor cats tend to live longer — often 15 to 20 years — compared to outdoor cats, which average 10 to 15 years due to higher risks.