Cat aged 10
About 56 in human years: a mature adult.
Cat age calculator
—
Follows the International Cat Care and AAHA guide: a cat is about 15 in human terms at one year and 24 at two, then ages about 4 human years each year. Life stages follow the AAHA/AAFP feline life stage guidelines. Indoor cats often live longer than outdoor cats.
In human years
56
A cat aged 10 years is about 56 in human years. Life stage: mature adult.
- Life stage
- Mature adult
- Old 7 × rule
- 70
- Vet checks
- Once a year
Cat years to human years
| Cat age | Human age | Life stage |
|---|---|---|
| 6 months | 10 | Kitten |
| 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 | Super senior |
| 16 | 80 | Super senior |
| 17 | 84 | Super senior |
| 18 | 88 | Super senior |
| 19 | 92 | Super senior |
| 20 | 96 | Super senior |
Reading your cat's age
A kitten grows up in a hurry. At six months it is roughly like a 10-year-old child, and by its first birthday it is about 15 in human terms. By two it is a young adult of about 24.
From then on the pace evens out to about 4 human years each year. A 10-year-old cat is about 56, and a 15-year-old about 76. That is why vets start talking about senior care from around 11.
Life stages help more than the exact number. Young adults, up to 6, need play and a weight check. Mature cats, 7 to 10, often start to slow down and put on weight. Seniors from 11 benefit from twice-yearly checks, blood tests and attention to teeth and kidneys.
Indoor cats, cats at a healthy weight and cats with regular vet care tend to live longest. If you do not know your cat's exact age, a vet can estimate it from teeth, eyes and coat.
Sources
What this calculator does not account for
- Differences between breeds.
- Indoor or outdoor life.
- Cats whose exact age is unknown.
How this is calculated
Formula: Cat years to human years
1 year ≈ 15; 2 years ≈ 24; then human age =24 + 4 × (cat age − 2)What the symbols mean
- cat ageYears, with months as a fraction.
Good to know
- Under a year, 6 months is about 10 human years.
- Life stages follow the AAHA and AAFP feline guidelines.
Read the full methodologyFound an error? Contact us
Worked examples
Each example is worked out by the same code as the calculator above.
Cat aged 2
About 24: a young adult.
Embed this calculator
The frame shows the tool only.
<iframe src="/embed/cat-age-calculator" title="Cat age" width="100%" height="720" style="border:0;max-width:42rem" loading="lazy"></iframe>Questions
How old is my cat in human years?
About 15 at one year, 24 at two, and then add 4 for each year after. A 10-year-old cat is about 56.
When is a cat a senior?
From about 11 years. Cats of 15 and over are sometimes called super senior or geriatric.
How long do cats live?
Many indoor cats live 12 to 18 years, and some reach their twenties.
Is a cat year 7 human years?
No. Cats mature very fast in the first two years, then age about 4 human years each year.
How often should an older cat see the vet?
Every six months is common advice from age 11, so that kidney, thyroid and dental problems are caught early.