What Age Do Cats Stop Growing On Average?


I personally like kittens more than fully grown cats as I find kittens cuter.

And if you want to know how much time it’s left for your cat’s kittenhood to end, then you have come to the right place to know the answer.

So when do cats stop growing?

A cat is almost fully grown when it’s age in 9 to 12 months. Cats with an age of more than a year are considered to have reached their adulthood. The things to observe to know when cats stop growing are the cat’s height, length and weight.

But you must be wondering:

What features do cats develop over time? How to care for a cat for it to grow in optimal condition?

Read on to find out!

Signs of a Growing Cat

Here is the complete timeline of how your cat grows according to its age:

Till 2 months:

Your cat’s weight will be around 1 and a half to two pounds. This is an important time for a cat as this is the development stage of a cat and it needs to stay with its mother over this period.

Between 2 to 4 months:

Your cat’s weight will go from 2 to 7 pounds in this period. This is the time when most cats are adopted, taken away from their mother. In this stage, you will need to switch to giving your cat more solid food rather than in liquid form. And you will need to give your cat a lot of attention and love as this stage is an emotional period for your cat.

Between 4 to 6 months:

Your cat’s weight will approximately be about 8 to 9 pounds. At this point, the baby teeth would have fallen out and would be replaced by adult teeth. This is the period in which cats go through puberty.

Your cat will go through sexual maturation and may experience mood swings. So do not worry if your cat becomes more aggressive at this point as it’s just a normal part of life. It is recommended by vets that you get your cat neutered at the 6-month mark.

Between 6 to 12 months:

Your cat’s weight will go from 8 to 15 pounds in this stage but the weight depends on the breed of your cat. At this point, cats are fully grown and have possibly reached their full size. This stage is considered to be the teenage of cats.

Between 1 to 2 years:

This is the stage of your cat’s adulthood. The maximum growth is reached at no late than 18 months. At adulthood, a cat’s weight is the double its weight was at 16 months. After reaching the two-year mark, your cat is fully matured, behaviorally and socially.  

All through this time, you need to take care of your cat responsibly and fulfill all of its needs.

Watch this video to help you understand how to care for a kitten:

Maximum Cat Growth According to the Cat Breeds

Persian Cats: Stops growing at the age of 2 years. Weight is between 7-13 pounds.

Sphynx Cats: Stops growing at the age of 1 year. Weight is between 6-12 pounds.

Ragdoll Cats: Stops growing at the age of 4 years. Weight is between 9-15 pounds. The length is 15 to 26 inches. Height is 9 to 11 inches.

British Shorthair: Stops growing at the age of 3-5 years. Weight is around 14 to 15 pounds. The length is 16 to 22 inches. Height is 14 to 20 inches.

Siamese Cats: Stops growing at the age of 10-12 months. Weigh is around 10 pounds.

Maine Coon Cats: Stops growing at the age of 4-5 years. Weight is about 14 to 25pounds. The length is up to 48 inches. Height is 8 to 16 inches.

Bengal Cats: Stops growing at the age of 2 years. Weight is between 10-22 pounds. The length is 13 to 16 inches. Height is up to 11 inches.

Birman Cats: Stops growing at the age of 1 year. Weight is between 9-15 pounds.

Munchkin Cats: Stops growing at the age of 1 year. Weight is between 6-10 pounds.

Savannah Cats: Stops growing at the age of 2- 3 years. Weight is between 12-20 pounds. The length is 20 to 25 inches. Height is 10 to 19 inches.

Social Maturity and Reproduction

Social Maturity

The time of your cat’s age between 3 to 6 months, it becomes more temperamental and clingy because of the hormonal changes going on in its body.

Your cat becomes calmer and matured around the age of two years as it settles into the life of a fully-grown cat.

But neutered cats might remain a bit less matured, bringing the playfulness and clinginess to its adulthood.


The puberty for cats begins from 6 to 9 months. At this stage, a male cat can to father kittens, so if you have got a male cat, then keep it away from the female cats.

As for female cats, they are able to bear a kitten if their body is becoming physically mature. But this can prove to be harsh on its growing body.

Neutering your cats is preferred to be done around this time, especially before the cat reaches its full reproductive maturity. Vets recommend to get your cat neutered before the cat reaches the age of 6 to 7 months.

Continue reading to know what type of food you need to feed your cat according to age.

Feeding Your Cat Age-Appropriate Food

Getting a proper diet plan from your vet is the best option but I can still give you some general guidelines:

  • It is recommended to feed your cat the type of food that is high in protein and Vitamin D to help its growth. Get a recommendation of such type of food product from a vet.
  • Feeding proper food for cats can be different according to their breed. But mostly, cats should be fed liquid or soft food till they are 3 months. And after they have reached 3 to 4 months of age, you can switch it to solid food.
  • In a matter of how often should you feed your cat, cats should be fed free of choice until they are 6 months old. Dr. Jim Carlson, owner of Riverside Animal Clinic, says:

“From 6 months to a year, an owner can feed three times a day.”

  • After your cat has reached the age of more than a year, feeding it two times a day would be good enough. But you should still consult your vet about this matter.
  • Other than some big cat breeds, like Maine Coon, cats should be switched to be fed adult food when they are around 9-12 months of age.
  • For a Maine Coon cat, you can keep feeding it with kitten food until they are 2 years old. This is to keep the cat’s weight balanced.
  • On the other hand, some cats who are maturing quickly can become overweight if you feed them kitten food for a long time.

So the feed should be switched to adult food around as early as 8 months. But you still need to consult a veterinarian in this matter.

Watch this video to learn about feeding your cat age-appropriate food:

Fun Fact: The maximum age of most cat breeds is 16 years. Indoor cats have a life expectancy of about 13-16 years. Whereas outdoor cats have a life expectancy of only 2-5 years!

Related Questions

At what age do domestic cats stop growing?

Even though many cats stop growing at 12 months, not all cats are done growing at this age. But if they are still growing, it will be at a much slower rate, generally from 12-18 months, so you can expect your cat to be very close to their full adult size at this point.

Do female cats grow slower than males?

Male cats tend to reach full size and grow faster and longer than female cats. This means that male cats are usually a little bit larger than female cats. Usually the difference is around 2 pounds, but it depends on the breed.

Is a 5-month-old cat still a kitten?

At 5-6 months the kitten is old enough to be spayed or neutered. Kittens can start to look like adult cats by 6 months of age thus they need nutritional support for optimum health and development during their growth phase which lasts 12 months.

How do you feed a 4-week old kitten?

The kittens will need to be bottle-fed with milk replacer every 2-3 hours (including overnight) and kept warm and dry. 1 – 4 weeks old will need to be bottle-fed kitten formula. 5 weeks and older can be offered canned food for kittens only but they may still need to be bottle-fed.


Kittens are really cute and I wish my cat could stay a kitten my whole life! But that’s not possible and we all know it. How sad!

But it is joyful to watch your cat grow. I hope you too enjoy the time of growing old together with your cat!


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