How old is a 10 year old cat in human years?
A 10 year old cat is about 56 in human years. By the veterinary life stage guidelines, a cat of 10 is a mature adult or senior.
A 10 year old cat
Cat age against human age
The dot marks a 10 year old cat. The line rises fast in the first two years and then evenly.
Cat age chart around 10
| Cat age | Human years | Life stage |
|---|---|---|
| 8 | 48 | Mature adult |
| 9 | 52 | Mature adult |
| 10 | 56 | Mature adult or senior |
| 11 | 60 | Senior |
| 12 | 64 | Senior |
After age two each cat year adds 4 human years, so 10 comes to 56 and 11 to 60. A cat of 11 will be a senior.
Compared with the old rule
The old rule of seven human years for each cat year would make a 10 year old cat 70. The veterinary chart gives 56, so the old rule is 14 years too high. Cats grow up quickly in their first two years and then age at a steady pace.
Questions
How old is a 10 year old cat in human years?
About 56.
Is a 10 year old cat old?
By the veterinary life stage guidelines, a cat of 10 is a mature adult or senior. The stages are kitten until 1 year, young adult from 1 to 6, mature adult from 7 to 10, and senior from 10 years on.
What is 56 human years in cat years?
About 10 cat years. Try the human years to cat years calculator for any age.
Is this exact?
No. Genetics, diet, indoor or outdoor life and health all affect how a cat ages, so treat the result as a general comparison. Ask your vet how often your cat should have checkups.
Other cat ages
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
For any age use the cat years to human years calculator. For dogs see dog years to human years.
Sources
- American Veterinary Medical Association (AVMA), guidance on converting a cat's age to human years (15 for year one, 24 for year two, 4 per year after).
- AAHA/AAFP Feline Life Stage Guidelines, 2021 (kitten, young adult, mature adult and senior age ranges).
Last reviewed 2026-10-26.