Cat years to human years
Cats mature fast, then age more slowly — so "multiply by seven" doesn't fit. A common chart puts the first year at about 15 human years and the second at around 24, then adds roughly four human years for each cat year after that. This tool applies that standard mapping.
Why the first two years count most
A one-year-old cat is physically like a mid-teen human, and a two-year-old like a young adult in their mid-twenties. That's why kittens seem to grow up overnight — most of the ageing happens early.
Indoor cats often live longer
Life expectancy varies with genetics, care and whether a cat lives indoors. Many indoor cats reach their late teens, which on this scale is well into human old age.
Frequently asked questions
Is this the same as for dogs?
No. Cats and dogs age differently, and dogs also vary by size. This mapping is specific to cats.
How old is a 2-year-old cat?
Roughly 24 in human years — a young adult. After that, add about four human years per cat year.
How do you convert cat years to human years?
Enter your cat's age above and this cat age calculator converts cat years to human years with the standard feline chart: the first year is about 15 human years, the second reaches 24, and each year after adds about 4.
Dog years vs cat years — what's the difference?
Both jump to roughly 15 human years in year one, but after adulthood cats add about 4 human years per calendar year fairly steadily, while dogs vary a lot by size — small dogs age slower and giant breeds faster. An old cat tracks close to an old small dog, while a giant-breed dog ages fastest of all.
How old is my cat in human years?
A 1-year-old cat is about 15 in human years, a 2-year-old about 24, and from there add roughly 4 human years per cat year — so a 10-year-old cat is about 56. Enter the exact age above for the figure.
Is one cat year seven human years?
No. The multiply-by-seven rule is a myth for cats just as for dogs. Cats mature fastest in their first two years, then age about four human years per calendar year.