Cat Age Calculator
Convert your cat's age to human years and see their life stage — from playful kitten to wise senior.
Human-year equivalent
36
human years
Life stage
Prime adult
Cat years to human years chart
| Cat age | Human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 4 years | 32 |
| 6 years | 40 |
| 8 years | 48 |
| 10 years | 56 |
| 12 years | 64 |
| 15 years | 76 |
| 18 years | 88 |
| 20 years | 96 |
Cat life stages
- Kitten (0–6 months): rapid growth and the kitten vaccine series.
- Junior (6 months–2 years): still growing up; spay/neuter and first-year boosters.
- Prime adult (2–6 years): yearly checkups and steady boosters.
- Mature (7–10 years): bloodwork and dental checks become more important.
- Senior (11+): more frequent vet visits to catch changes early.
Frequently asked questions
How old is a 1-year-old cat in human years?
About 15. Cats mature quickly: roughly 15 human years in the first year and 24 by their second birthday.
How many human years is each cat year after two?
A commonly used guide adds about 4 human years for every cat year after the second.
When is a cat considered senior?
Veterinary guidelines generally call cats mature at 7–10 years, senior from 11, and super senior from 15.
How often should an adult cat see the vet?
At least once a year for a checkup and boosters, and often twice a year for seniors. Your vet will recommend what fits your cat.
More pet guides & tools
This is general information, not veterinary advice. Every pet is different — check with your vet.