How Are Cat Years Calculated? The Feline Calendar Explained

A cat’s age is calculated by adding up its birthdays. For example, if your cat was born on January 1st, it would be one year old on February 1st, two years old on March 1st, and so forth. This method works best for cats that are active and have normal urinary habits. 

If your cat has any medical issues or is not generally active, then a more accurate calculation may need to be used. To get into details regarding how cat years are calculated, check more information below.

Ways On Telling Your Cat’s Age

There is no foolproof way to determine your cat’s age, but a few simple methods can be used. One approach is to use their tooth marks as an indicator of age. Older cats will have more extensive tooth wear and tear, which will show up in the pattern of their teeth marks. 

Another method that has been found to be accurate is assessing how long it takes for them to become adjusted or trouble-free after moving away from home. A young cat may not take too long to adjust while an older cat may require several days or weeks before adjusting comfortably in new surroundings.

Check more details below to know how to tell your cat’s age.


Cats have a natural divination ability using their teeth. They can estimate their age by counting the number of baby teeth, adult incisors, and canine teeth they possess. 

Here’s how: Cats start to lose baby teeth at about 6-8 weeks old and continue to shed until they are two years old or older. Adult cats typically have 8-12 adult (incisor) teeth, three upper molars (wisdom), and up to 20 lower molars! 

Thus, counting your cat’s baby/adult tooth count is a great way to estimate their age – as the number of wrinkles on their cat’s mouth increases with age! 


One of the first things you might notice about your cat is its eye color. If it starts to change, such as from bright blue to green or brown, this may signify that they are feeling sick or aging rapidly. 

The way cat years are calculated by counting the number of times your cat’s eyes have turned white – so if one of their eyes turns white for the first time when they’re around six years old, that’s counted as one year in cat years! You can use this information to check out our guide on caring for aging cats and keeping them healthy and happy. 

In addition, knowing their age in human years can be a good indicator of their health and well-being. So make sure you’ve got an accurate count down at all times!

Muscles and Bones

There are a few methods that you can use to determine the age of your cats by their muscle and bones. One way is to use x-rays to measure how much bone has been built up in various areas of the cat’s body. 

Another option is to look at how well your cat’s teeth are aligned, as this will indicate when they were last neutered or spayed. Other indicators that may be useful include whether or not your cat is obese, has arthritis or showing signs of diabetes. 

Ultimately, it becomes important to see a vet for an accurate diagnosis and treatment plan if there are any abnormalities in your animal’s skeletal system. 


Coat length is a great way to determine your cat’s age. When cats grow up, their coats change often and will grow at different rates depending on their breed and age. 

As the cat grows, their coat will continue to grow and change – this is why they can look different when growing up. Cats are born in winter, and their coats will start to grow around 6-8 weeks old. 

The length of a cat’s coat is based on its age, health, and the environment – some cats have shorter coats than others.

Calculating Cat’s Age In Human Years?

There’s something special about cats – they’re always up for a game of cat and mouse. And to make the game even more fun, cat years are calculated using a feline calendar. 

When a cat is born, its first year is based on its birthdate – December 22nd in human years. Every other year is 1/4 of a cat’s age or six months. So, February 2nd would be your cat’s 8th birthday in cat years. 

This makes for an exciting game to play with your feline friends – see which one can outlive you! As your cat reaches 12 full human years (360 days), their cat years will continue rolling until they reach their human age. 

So, don’t be too surprised when your feline friend turns 16 years old – they’ve been playing cat and mouse from age 12!

The Aging Of Cats

When cats turn one, they will have had approximately 3 1/2 cat years. Every day after their first birthday is another 1/12 of a cat year until they reach the age of six (6) months (= 3 1/24= 0.333 Cat Years)—cats age in cat years, or 360 days. A human year is equivalent to about 365 cat years. Such cats age like a human every year (unless they have significant health issues)!

The Importance Of Understanding Your Cat’s Age

As cats age, their feline calendar changes yearly, depending on their birth month. So, if your cat were born in January, their feline calendar would look different from a cat born in February. 

Understanding your cat’s age is essential – not only for determining how old they are in cat years but also for providing them with the best possible vet care. For example, cats age one year in feline terms on February 2nd. 

So, if you’re wondering how old your cat is and want to be sure you’re providing them with the best possible care, keeping an eye on their feline calendar is the first step! Additionally, knowing a cat’s age is essential for various reasons, including determining how old they are in human years and helping you relate to them better. 

Understanding your cat’s age can also help cat breeding and guardianship. 

Calculating Cat Years

There’s something pretty special about cat years. Next year, they’ll be five years old and so on… but don’t worry – they won’t remember! In the feline calendar, age is calculated by counting the months since their birthday. 

So, your feline friend will be four years old this year in October. C lifespan expectancy varies depending on the breed, but they typically live around 10 to 12 years. 

With a little bit of math and a few basic rules of cat year calculation, you’ll be able to keep your feline friend healthy and happy for years to come!

The Feline Calendar Explained

It can be unclear to keep track of cat years, especially when they seem to grow up so fast. We’ve put together this handy guide to cat years and calendars. 

We’ll explain the feline calendar in detail and help you to understand the different phases of a cat’s life. We also provide tips on how to keep track of cat age and years. 

Signs Of Aging In Senior Cats

It can be tough to determine a cat’s age, especially if they haven’t shown any outward signs of aging. However, by understanding the four main stages of cat years and the behaviors that typically accompany them, you’ll be able to identify your cat’s age more accurately. 

Kitten years are marked by playful and active behavior, young adult years are characterized by a feline ‘bulls-eye’ pattern around the eyes, middle-aged years are marked by a gradual thinning of the fur, and old adult years are marked by slower movement and a gradual decline in health. 

Each stage has its own set of behaviors that can help you identify whether your cat is in that particular stage of its life. For example, during kitten years, cats will often play constantly and be very active.

 As young adults, cats may start to display the feline ‘bulls-eye’ pattern around the eyes. Middle-aged cats may begin to lose fur at a faster rate and may start to eat. Check more information below to know the signs of aging in Senior Cats.

Dental Issues

As cats age, their teeth become less efficient, and they may develop dental issues. These can range from simple problems such as chewing on furniture or food to severe conditions such as tooth abscesses or even root canal surgery. 

It is important to give your cat regular dental cleanings so that their teeth are kept in good condition, and any potential problems are detected early on. Doing this, you help them stay healthy and happy for a long time! 

Skin And Coat Problems

Skin and coat problems are common in senior cats. They may experience dryness, flaking, itchiness, and poor hygiene. 

Veterinary check-ups can help identify the underlying causes of these problems and provide the cat with the necessary treatment.

Eye Tears And Infections

As cats age, their eyesight becomes less than perfect. This can lead to several problems, including loss of appetite, weight gain, stiffness, and difficulty getting up or walking. 

If you notice any of these signs in your cat, you must bring them in for a check-up as soon as possible. If the problem is severe enough, they may need antibiotics and pain relief medication to treat their conditions. 

It’s also essential to keep your senior cat comfortable by providing them with the right food (high-quality kibble), water (distilled or filtered), and shelter from the weather (a warm place indoors). Ensuring their clean environment will help prevent eye tears and infections from developing.

Joint Pain

There are a few key reasons why cats may experience joint pain. A decrease in mobility, poor hygiene, or arthritis can be the cause. 

Suppose your cat is displaying one or more of the following signs. In that case, it’s essential to take them to the vet for a check-up: 

  • a reluctance to move around and difficulty getting up from a lying position 
  • weight loss despite an unchanged appetite 
  • increased drinking and urination habits 
  • not using their limbs as much as usual.

Less Activity

As cats age, their activity level naturally decreases. This is mainly due to a decline in muscle mass and joint function. 

Cats can become less active as they age, leading to difficulty keeping up with their usual activities – playing, chasing, etcetera. If your cat isn’t getting the exercise they need, it could be a sign of illness or aging-related diseases such as arthritis. 

If you notice that your cat’s Activity Level (AL) has decreased over the past year or two, take them to see their veterinarian for a check-up. A proper assessment will help determine the cause of the decrease and whether any underlying health issues might require treatment.”