Cat Age Calculator

Cat's age, years

Lifestyle

Result

In human years36
Life stageвзрослая
Typical lifespan16
Roughly remaining11
Vet check-ups a year1

This result is informational only and is not professional advice.

The first year is worth fifteen

A cat's age in human terms, the life stage it corresponds to and life expectancy indoors versus outdoors.

Cats mature fast and then age slowly. The first year corresponds to about fifteen human years, the second adds nine, and every year after that only four. A two-year-old cat is already a twenty-four-year-old person.

Life expectancy turns almost entirely on one thing: whether the cat goes outside. Indoor cats average sixteen years, outdoor ones about ten, and the gap is explained by traffic, fights and infection rather than by diet.

What this calculator shows

Age in human years and the corresponding life stage
Life expectancy for the lifestyle selected
How often a cat of this age should see a vet

What to keep in mind

The scale is an average; breed variation is much smaller than in dogs, so size is not a factor here.
From seven years on, vets advise a check-up twice a year — the calculator flags that.

FAQs

How long do cats live?

Indoor cats average 15 to 17 years and often reach twenty with good care. Cats with outdoor access average about ten, with traffic and infection the main causes of early death.

When is a cat senior?

From eleven it counts as mature senior, from fifteen as geriatric. Signs are reduced activity, weight loss, more sleep and fussier eating.

What should I watch in an older cat?

Kidneys, thyroid and teeth — the three commonest problems after ten. Early signs are increased thirst, weight loss despite a good appetite, and bad breath.

How do I estimate a rescue cat's age?

From teeth and eyes: white teeth and a clear iris in a young cat, tartar by seven or eight, a cloudier iris by ten. Expect roughly two years of uncertainty either way.

Worked example

A five-year-old indoor cat

Input: 5 years, indoor only

Output: 36 human years, adult

Note: Prime of life. Senior status arrives nearer eleven, which is when twice-yearly check-ups and kidney monitoring start to matter.

Useful links

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Cat Age Calculator

Result

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