How Old Is My Cat? 4 Helpful Signs Vets Look For
Published: July 8, 2020
how old is my cat

You may be wondering “how old is my cat?”. It is a common misconception that one cat year equates to seven human (calendar) years. This is not true as cats age more rapidly than this during the first two years of their lives. When your cat reaches one year of age, this is the equivalent of fifteen human years, and at 2 years old, the equivalent is 24 human years. From then on, your cat ages at the rate of 4 human years for every cat year ( 8 human years if the cat lives outdoors). See the below table for a quick reference guide followed by what your vet may look for to determine your cat’s age.

How Old Is My Cat In Human Years?

Life StageAge of CatHuman Equivalent
Kitten (up to 6 months)0-1 month0-1 year
2 months2 years
3 months4 years
4 months6 years
5 months8 years
6 months10 years
Junior (7 months – 2 years)7 months12 years
12 months15 years
18 months21 years
2 years24 years
Adult (3-6 years)3 years28 years
4 years32 years
5 years36 years
6 years40 years
Mature (7-10 years)7 years44 years
8 years48 years
9 years52 years
10 years56 years
Senior (10-15 years)11 years60 years
12 years64 years
13 years68 years
14 years72 years
Super Senior (15+ years)15 years76 years
16 years80 years
17 years84 years
18 years88 years
19 years92 years
20 years96 years
21 years100 years
22 years104 years
23 years108 years
24 years112 years
25 years116 years

Your vet is the best person to be able to determine your cat’s age. They will be able to look for various signs to give a rough idea. It is always helpful to know the approximate age of your cat so that you can offer better age-appropriate care. Things they may look out for include:


Baby (deciduous) teeth appear at 2 – 4 weeks and finish growing when the cat is approximately 8 weeks old.

At 3-4 months, the permanent adult teeth begin to emerge and displace the baby teeth (teething). By 6 to7 months of age, all the shiny white adult teeth will be in place.

Cat’s teeth may start to dull and some staining may be visible at around 2 years old, with a little tartar beginning to build up around the gum line from around 3 years old.

Using the build-up of tartar as a determining factor for a cat’s age is not a foolproof indicator in cats over a year old, as just like humans, some cats naturally have better teeth than others and previous owners may have had a good dental routine in place.

Muscle Tone

how old is my cat

As with humans, gravity takes its toll and cats are no exception. You may notice a ‘primordial pouch’ hanging from under your cat’s belly which swings from side to side as he/she runs towards you. As a kid, I always thought this was where cats stored their biscuits. 😹


how old is my cat

Young cats and kittens will usually have soft, fine coats, increasing to thicker/coarser fur as the cat ages. The coat may also change colour and/or develop white or grey individual hairs upon ageing.

How well they groom themselves can change with age. Older cats are more likely to experience dental issues (causing pain), weight gain (making it harder for the cat to reach around to lick itself), and arthritis. All of which can impact how well a cat grooms itself.


how old is my cat

Healthy kittens and young cats should have bright, clear eyes. From the age of 6-7 years old, the lenses of the eyes get denser which isn’t really noticeable until the cat reaches at least 10 years old. Changes to the iris in senior cats can occur such as iris atrophy, where the inside of the iris breaks down so the pupils don’t get as small as they once would. The inner iris can also appear wavy and have jagged edges as the cat ages. This however does not cause any pain to the cat.


This page may contain affiliate links. If you purchase a product through one of them, I will receive a commission (at no additional cost to you). I only ever endorse products that I have personally used and benefitted from. Thank you for your support!




Privacy Policy

You have Successfully Subscribed!

Pin It on Pinterest

Share This