Cat age calculator
How old is your cat in human years? Enter their age.
How we calculate it
Cats grow up fast: the first year equals about 15 human years and the second about 9 more. From then on, each cat year adds roughly 4 human years. Life stages follow the AAHA/AAFP feline life stage guidelines: kitten (under 1), young adult (1–6), mature adult (7–10) and senior (11+).
Questions people ask
How old is my cat in human years?
A 1-year-old cat is roughly like a 15-year-old person and a 2-year-old cat is about 24. After that, add about 4 human years for every cat year. So a 10-year-old cat is roughly 56 in human years.
When is a cat considered senior?
Feline health guidelines treat cats aged 11 and over as seniors. Cats aged 7 to 10 are mature adults.
Do indoor cats age differently?
The age conversion is the same, but indoor cats tend to live longer on average because they're protected from traffic, fights and many infections.