How to calculate the age of the cat in human age?

Calculating the age of the cat in human age is a natural trend among cat owners. The idea that you have to multiply the age of the cat by seven to have its equivalent in human age is an urban legend. It’s actually very rough.

The cat ages much faster in its first years than in the second half of its life. Knowing his “human” age is always interesting to get an idea of ​​the physical difficulties he can feel: you just have to compare with a human.

The average lifespan of a domestic cat

calculate human age of a cat

A domestic cat has an average lifespan of around 13 years. This figure does not speak much since the life expectancy of a cat varies greatly depending on its breed, its environment and the way it is cared for. It is difficult, however, to have a cat that is over the age of 16: this is the case for only 18% of them. That said, this is not inevitable since the longevity record was held by Puss, a cat who lived 36 years, which is exceptional! As a general rule, if the cat is well cared for, pampered, fed, it has a life expectancy far above the average.

Correspondence between the age of the cat and the human age

So that you can see more clearly about the age of your cat, here is a table which indicates the correspondence , in number of years, of the age of cats with the age of men.

Real age of the catEquivalence in human age
1 year19 years old
2 years24 years
3 years28 years
Four years32 years old
5 years36 years
6 years40 years
7 years44 years
8 years48 years old
9 years52 years
10 years56 years old
11 years60 years
12 years64 years old
13 years68 years old
14 years old72 years
15 years76 years
16 years old80 years old
17 years84 years
18 years old88 years
19 years old94 years
20 years100 years
21 years old110 years

Hereditary factors

There are hereditary factors that explain why some cats have a lower than average life expectancy. This is the case, for example, of certain hereditary conditions, such as polycystic kidney disease in the Persian cat or hypertrophic cardiomyopathy in the Maine Coon.

Reliable correspondences:
The correspondences between the age of the cat and the human age were established after very precise calculations and veterinary observations carried out on the cats. The results that came out are those that appear in the correspondence table. Thus, the cat acquires 19 “human” years at the end of its first year of life, then it increases by 4 years in 4 years, then by 6 years in 6 years … This is explained by the fact that the cat has very rapid growth, then stabilize and age less and less quickly.