How long do cats live?

17 May 2021 - 5 min read
Kitten hiding under a rug

Cats tend to live between 12 and 15 years. However, it’s hard to find consistent evidence of the average lifespan of a household cat.

Today it is not uncommon for cats to live to be 20 years old or older. Even just a generation ago, it was rare for a cat to live past 10. But now, due to our improved understanding of cat health and access to high-quality veterinary care, cats are living longer than ever.

Many factors influence how long you can expect your pet cat to live. One of the most important considerations is whether your cat lives indoors or has access to the outside world.

How long do indoor cats live?

The average age of indoor cats varies quite a bit, but it’s normally between 12 and 18. 

Indoor cat lifespan is dependent on a few factors: 

  • Breed 

  • Diet 

  • Genetics

  • Environment 

If you’ve come here to ask “do indoor cats live longer?”, then the answer is yes.

Indoor cats live longer than outdoor ones because they face fewer risks. 

How long do outdoor cats live?

The average lifespan for outdoor cats is much shorter, just two to seven years.

This includes cats who go outside occasionally and those who rarely come inside as they both face risks outdoors that can shorten their lives.

Cats who go outdoors can face predators, cars, and other cats who can injure or even kill your pet. Fight wounds often become infected, and cats may hide instead of coming home for treatment, putting their lives at risk from an easily treated injury.

Outside, cats are exposed to fleas and ticks, intestinal worms, and diseases from other cats. While parasites can be prevented with monthly treatments, there is no prevention or treatment for Feline Immunodeficiency Virus (FIV), severely compromising your cat's immune system making them more vulnerable to disease.

Another virus common in outdoor cats is Feline Leukemia Virus (FeLV), transmitted through friendly contact between cats. There is a vaccine against FeLV, but if your cat does get it, she is likely to become very ill at a young age.

In short, it's OK to let your cat roam and enjoy their life outdoors, but you should make sure you keep up with their annual vaccinations and monthly preventative treatments.

How long do cats live in human years?

We know that cats age differently than humans, and we are always trying to figure out how old our pets are in “human years.” This chart, provided by the American Animal Hospital Association, helps convert a cat’s age into the equivalent human years.

There are many things pet parents can do to try to give their cats long, healthy lives. These include lifestyle, access to veterinary care, and keeping up with cats' needs as they age.

What impacts the lifespan of cats?

Indoor cats still face risks to their health, but most of these can be managed through regular veterinary visits and preventative care.

But just like for humans, genetics play a significant role in determining their lifespan. Some families of cats simply live longer. Unlike humans, though, you are unlikely to know who your cat's parents are, let alone trace their ancestry.

One important and easy thing you can control is whether your cat is spayed or neutered. Spaying or neutering a cat increases their lifespan by 37% and 62%, respectively! (State of Pet Health Report 2013, Banfield Pet Hospital). It is also part of being a responsible pet parent.

Common cat health issues that can impact their lifespan

Some of the common cat health issues include: 

  • Deficits in kidney function (chronic kidney disease)

  • Overactive thyroids (hyperthyroid)

  • Diabetes

  • Digestive issues (inflammatory bowel disease/small cell lymphoma)

How to help your cat live longer

Regular vet visits

Regular visits to the veterinarian and proper preventative care can increase a cat’s lifespan.

Your veterinarian is trained to notice changes before they become life-limiting illnesses. These include weight, coat health, and dental health, in addition to shifts in bloodwork that indicate disease. But your veterinarian can only identify the problem; it is up to you as a pet parent to take action.

Learn some care basics

Learn how to do the basics like giving your cat medication or providing prescription food. You may also want to make changes around the house, such as adding extra litter boxes or making them easy to access if you have an ageing cat.

Behaviour training

Just as pet parents need to be willing to provide treatment, cats also need to be trained to accept it. A few pet parents think that cats' behaviour can impact your ability to care for them. Uncooperative cats can make it harder to give them treatment.

Veterinarians can provide a mild sedative for you to give your cat before the clinic trip so that their behaviour doesn’t stop them from getting care. Start training your cat from a young age using positive reinforcement to encourage it to accept medication and be calmly handled at home.

Nutrition

At home, keep your cat at a healthy weight to reduce their risk of diabetes and painful arthritis, which can both reduce a cat's quality and length of life.

Provide high-quality, nutritionally balanced food, clean litter boxes, plenty of fresh water, and lots of playtime.

Kitten-proof your home

Homes with kittens should be kitten-proofed. Middle-aged cats should be encouraged to be active. Older cats even have different grooming needs as their skin gets thinner, and they may not use their scratching post as vigorously.

Adapt to their age

As your cat ages, keep up with their changing needs to improve their quality of life. Kittens, adult and old cats all have different needs, including active playtime, type of food, and litter box type, among other household modifications.

While you can't will your cat to live forever, keeping them indoors, getting them to the veterinarian regularly, and making sure they feel safe and loved at home can go a long way to extending their lifespan.

How cat insurance helps

Cat insurance can help you and your cat prepare for the unexpected, and helps make sure your kitty can access the car they need.

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High-quality cat insurance

Insure all nine lives

We know your cat knows best. But let's keep them protected from any unexpected accidents or illnesses - just in case.

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Hanie Elfenbein, DVM
Emergency Clinician

Dr. Elfenbein received her DVM from the University of California, Davis where she also earned a PhD in Animal Behavior as part of the Veterinary Scientist Training Program.