Skip to main content

PawTracks may earn a commission when you buy through links on our site.

If you aren’t sure how old your cat is, there are a few easy ways to find out

You might not know your cat’s age, especially if you adopted your feline friend from a shelter. However, this information is extremely beneficial as it enables you to provide them with the care they need as they progress through life. For instance, your vet will be on the lookout for certain conditions that typically emerge at particular ages, and you’ll also know when it’s time to switch your cat from kitten food to adult cat food.

If you’re wondering how old your cat is, the following tips can help you determine their approximate age.

Grey cat leaning over a stone wall
Image used with permission by copyright holder

How do you determine your cat’s age?

Even though you may never know your cat’s exact age, it’s important to establish a baseline. There are several things to pay attention to.

Recommended Videos

Look at your cat’s teeth

If your cat is young, their teeth might offer insight into their age. Kittens start to develop baby teeth at about 2 weeks old, and those teeth finish coming in once the kitten is about 8 weeks old. When the kitten reaches 4 months of age, their baby teeth will start to fall out as their adult teeth come in. Kittens will usually have all their adult teeth once they’re 7 months old.

Judging age based on your kitten’s teeth can be a little tricky, and this method is useful only until your kitten reaches about 7 months of age. Your vet can help you examine your kitten’s teeth and assist with establishing an approximate age.

Pay attention to your cat’s eyes

Cats’ eyes change as they mature. Kittens’ eyes are bright and clear, but once a cat reaches about 6 years old, their lenses become a little cloudy. Your cat’s irises will also gradually break down as they age, which prevents your cat’s pupils from fully contracting. Again, your vet can help you recognize what age your cat’s eyes imply they are.

Observe activity and grooming habits

Your cat’s activity level and grooming habits may also provide some clues about their age. Most younger cats and kittens are highly playful and active, but their activity level tapers off as they get older.

Younger cats tend to be meticulous groomers, but as cats age, arthritis and general lack of mobility can make it more difficult for them to groom themselves as thoroughly.

Your vet can help you weigh all the above factors and then make an educated guess about your cat’s age. Unless you know your cat’s birth date, there’s no way to calculate their precise age, but with your vet’s input, you can estimate how old your cat might be.

White cat playing with a scratching post
Daga_Roszkowska / Pixabay

Calculating your cat’s age in human years

People used to assume that one year of a cat’s life was equal to seven years of human life, but that calculation isn’t quite accurate. Consider how quickly your cat grows during their first year of life. A 1-year-old cat is actually equivalent to a 15-year-old human. Once your cat is 2 years old, they’re the equivalent of a 24-year-old human.

The best way to determine your cat’s age in human years is to use a cat age calculator.

Orange cat outdoors looking at something intently
majacvetojevic / Pixabay

How long do outdoor cats live?

On average, outdoor cats live significantly shorter lives than indoor cats. According to a report by the University of California Davis, indoor cats live an average of 10 to 15 years, while outdoor cats typically live only two to five years. Outdoor cats are exposed to more dangers than indoor cats, such as predators and road traffic.

A chubby tabby cat sits outside of a pink building.
Image used with permission by copyright holder

Understanding how old your cat is can help you ensure they’re getting the care they need. You and your vet can work together to watch for health issues that tend to occur at different stages of life. This will help you support your cat through the common challenges of growing older, such as arthritis. While you might never know exactly how old your cat is, you can usually make a close guestimate. And when it comes to your cat’s birthday, you get to decide which day will be their special day (and then, of course, celebrate accordingly).

Paige Cerulli
Former Digital Trends Contributor
Paige's work has appeared in American Veterinarian, Business Insider, Healthline, and more. When she's not writing, Paige…
Should cats eat yogurt? Read this first before feeding your kitty this snack
What types of yogurt are safe for cats? Here's what kitty caregivers should know
Large silver tabby looking at camera

You may have heard that cats adore milk. It's cliche to "leave a saucer of milk" out for a kitty. The truth is that cats don't need milk once they wean from their mother, a gradual process that concludes around eight weeks. After that, cats need food and water like their canine "friends." In fact, cats can become lactose intolerant because they don't need milk.

However, you might be interested in slipping your cat an occasional treat that doubles as your favorite food. Yogurt may fit that bill. But should cats eat yogurt? The answer isn't black and white, and it's individual to your cat. Indeed, yogurt is usually a dairy product, though some plant-based versions exist. However, dairy isn't toxic to most cats. Not all kitties are lactose intolerant. Some can consume certain dairy products but not others. Let's sort out the facts about cats and yogurt.
Should cats eat yogurt?

Read more
How to tell if your cat has fleas (and tips to get rid of them)
Getting rid of fleas for good can be easy with these tips
A striped gray tabby kitten lying on its back.

Warm weather makes most people think of beach vacations, backyard cookouts, and crisp lemonade. For pet parents, though, warm weather also signifies the increased population of one of the most obnoxious pests ever — fleas. While your cat can catch fleas year-round, warmer weather creates a much more welcoming environment for these invaders, and your cat is likelier to spend more time outdoors when the weather is nice.

Fortunately, you can take a few helpful steps to help your cat stay flea and itch-free. Learning how to tell if your cat has fleas only takes a few minutes, but this knowledge will help both you and your cat for years to come.
How do cats get fleas?

Read more
Why do cats stick out their tongues? Surprising reasons explained
Health concerns to harmless changes: Reasons cats stick out their tongues
Side view of a cat sticking out its tongue

If you've ever wondered, "Why do cats stick out their tongues?" you're not alone. Whether you've noticed your cat doing it and wondered whether your cat is sick, or you've simply seen a cute TikTok, try not to worry. Most cats occasionally "blep" or stick their tongues out, and it's rarely a cause for concern. In fact, it's downright adorable! (Search for 'cat bleps' online when you're feeling down; the precious images are the perfect pick-me-up.)
What causes cats to blep? We'll explore a few potential reasons behind this strange yet adorable behavior.
Why do cats stick out their tongues? Here are a few reasons

As odd as this behavior may look, you'll be glad to know that you rarely need to worry about a cat sticking out their tongue.
Your cat is exploring the world with their tongue
One of the most common reasons for an exposed tongue is rather simple: your cat is literally exploring their surroundings. When your cat leaves their mouth open and tongue out, they're collecting pheromones on their tongue -- this is called the Flehmen response. Those pheromones give your cat important information about other cats around, including whether they're in heat, via electrical signals from body to brain. Who knew something so cute could be so helpful, too?
Your cat may show their tongue if they're missing teeth
Sometimes, cats let their tongue hang out a little because they're missing their canine or front teeth. These teeth help keep the tongue within the mouth, so if your cat is missing one or two of these teeth, it's more likely that their tongue will slip out from time to time. No worries!
Your cat is trying to please you with a behavior they think you like
You might even be reinforcing your cat to stick their tongue out without knowing! If you laugh at your cat, give them attention, or give them a treat when they do this behavior, they may quickly learn that sticking out their tongue gets a positive response. You might start to see your cat do this repeatedly, mainly to get a positive reaction from you. Whether that's 'good' or not is up to you to decide.
Your cat may let their tongue fall out of their mouth when they're relaxed
Sometimes, when cats are relaxed, their tongues naturally slip out. This happens because your cat's jaw loosens up as they relax, so their mouth opens up just enough to let the tongue through.

Read more