Cat Age Calculator
Human Year Equivalent:
Cats are masters of aging gracefully, but their biological clock moves much faster than ours. A one-year-old cat is roughly equivalent to a 15-year-old teenager. By age two, a cat has reached the human equivalent of 24 years old. After age two, each feline year is roughly four human years.
This tool helps cat owners understand their pet's needs. A "Senior" cat (11-14) has different needs than a "Geriatric" cat (15+). You can also use our Exact Age Tool to find out exactly how many days your cat has been with you, or check their Half-Birthday.
If you have multiple pets, compare their stages with our Dog Age Calculator to see who is truly the "oldest" in human terms.
Pet Aging FAQ
How old is a 1-year-old cat?
A 1-year-old cat is approximately 15 human years old.
Do indoor cats live longer?
Yes, significantly. While their chronological age is the same, their Biological Health is often much better.
When is a cat considered geriatric?
Usually at 15 years. You can set a Countdown to their next birthday here.
Is my cat a "Millennial"?
Only if they were born between 1981-1996! Check the Generation Finder for dates.
Can I see my cat's age in seconds?
Yes, use the Age in Seconds Tool.
Does breed matter for cats like it does for dogs?
No, cat aging is much more uniform. For the dog version, visit the Dog Age Tool.