Cats
Cat age calculator: cat years to human years
A cat’s first year equals about 15 human years and its second 9 more (24 at two); after that each cat year adds about 4. A 10-year-old cat is about 56.
Cat years to human years chart
| Cat age | Human years | Life stage |
|---|---|---|
| 1 | 15 | Young adult |
| 2 | 24 | Young adult |
| 3 | 28 | Young adult |
| 4 | 32 | Young adult |
| 5 | 36 | Young adult |
| 6 | 40 | Young adult |
| 7 | 44 | Mature adult |
| 8 | 48 | Mature adult |
| 9 | 52 | Mature adult |
| 10 | 56 | Mature adult |
| 11 | 60 | Senior |
| 12 | 64 | Senior |
| 13 | 68 | Senior |
| 14 | 72 | Senior |
| 15 | 76 | Senior |
| 16 | 80 | Senior |
| 17 | 84 | Senior |
| 18 | 88 | Senior |
| 19 | 92 | Senior |
| 20 | 96 | Senior |
| 21 | 100 | Senior |
| 22 | 104 | Senior |
| 23 | 108 | Senior |
| 24 | 112 | Senior |
| 25 | 116 | Senior |
Citing this? Link to https://tools.thesturdypaw.com/cat-age/. Computed from the AAHA/AAFP rule: 15 at one, 24 at two, then 4 a year. Free to reuse with a link (CC BY 4.0).
Cat life stages
- Kitten: birth to 1 year.
- Young adult: 1 to 6 years.
- Mature adult: 7 to 10 years.
- Senior: over 10 years.
These are the stages in the 2021 AAHA/AAFP Feline Life Stage Guidelines. Senior cats are usually seen by a vet twice a year.
Questions
How old is a 10-year-old cat in human years?
About 56: a cat reaches 24 at age two and adds about 4 human years each year after that.
How old is a 15-year-old cat in human years?
About 76 human years, well into the senior stage.
How old is a 5-year-old cat in human years?
About 36, a young adult.
Is one cat year seven human years?
No: a cat’s first year is worth about 15 human years and its second about 9, then each later year about 4.
When is a cat a senior?
Over 10 years old, under the 2021 AAHA/AAFP guidelines; 7 to 10 is “mature adult”.
Do indoor cats age differently?
The conversion is the same. Indoor cats are generally thought to live longer, but how your cat ages depends on its health, weight and care.
How old is a 20-year-old cat in human years?
About 96: cats that reach 20 are the feline equivalent of very old people.
How old is a 1-year-old cat in human years?
About 15: a one-year-old cat has finished most of its growth and is entering young adulthood.
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