One of the most popular questions we get asked is “When do cats stop growing?” Within a matter of months your feline can shoot up to a near adult size, and it may seem like just yesterday you could fit your baby kitten in the palm of your hand. In order to understand when kittens stop growing and when kittens reach full maturity, it’s important to know the developmental stages of cats.

When do cats stop growing

On average, cat’s stop growing when they are 18 months old. However, there are many factors that can affect this number, including diet, environment, and most importantly the breed of cat.

Cat Growth Stages: When are cats fully grown? When does a cat stop growing?

Below is a chart that shows the growth stages of a cat.

• 0-2 months: This is the most important developmental stage of the kitten’s life and should be spent with the mother.
• 2-3 months: This is the stage when most kittens are adopted and separated from their mother. This marks their transition from liquid to more solid food. This can be the most emotional period for your cat, and it is recommended that you give it a lot of attention. They usually reach a size of 2-4 pounds during this stage.
• 3-6 months: This is the cat’s “adolescent” stage where it goes through puberty. The cat may experience mood swings or become more aggressive, but this is just a part of life. They might start grabbing your leg when you walk. Most vets recommend that you get the cat neutered around the 6 month mark or a littler earlier.
• 6-12 months: This can be considered the teenage/young adult years. During this period, the cat generally reaches its full size. It depends on the breed of cat, but the cat should reach a weight of 8-15 pounds
• 1-2 years: Most cats reach their maximum size at 18 months, which is when most kittens stop growing. Some cats may still experience some growth after this stage, but at a much slower pace. On average, a cat’s full adult weight should be double the cat’s weight at 16 weeks old.

Cat Growth Chart

Here is a Cat growth chart which should help you visualize when your cat should stop growing:

Best Cat Food for Cat Growth

If you are concerned about your cat’s growth, we recommend feeding your cat food that is high in protein and Vitamin D. There are many cat foods that contain these ingredients, but they usually come in cans and get pretty expensive (around $40 for 20 cans). We recommend buying high protein cat food in bags, as they are a much better value. Our recommendation for the best high protein cat food is the 22 lbs Meow Mix Protein Cat Food. The 22 lbs bag only cost $14 dollars and lasts around 2 months. The cheapest place to buy Meow Mix is here at Amazon.com

When do cats stop growing? In particular, when will my cat stop growing?

A common misconception is that a kitten’s paw size, like dogs, can determine the future size. However, this is not the case. A cat’s dna make-make up, nutrition, and environment are the key factors in determining the size of the cat and when it will stop growing.

What Age Do Cats Stop Growing? Average Cat Weight

On average, most cats stop growing at the age of 18 months. However, it can vary based on breed. Additionally, sometimes cats will develop a primordial pouch when they get older. Read below to see when some of the most popular cat breeds stop growing along with the average cat weight.

When do Female and Male Cats Stop Growing?

Male cats tend to reach full size and grow faster and longer than female cats. This mean 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.

When are cats fully grown?

This list shows when are cats fully grown based on breed.

When do Siamese Cats Stop Growing?

Siamese Cats stop growing at the age of 10-12 months and reach an average size of 10 pounds.

When do Persian Cats Stop Growing?  

On average take a little longer to mature. Persian Cats stop growing at the age of two and weigh 7-12 pounds

When do Sphynx Cats Stop Growing?

The Sphynx cat stops growing at the one year mark and reaches a weight of 6-12 pounds.

When do British Shorthairs Stop Growing?

The British Shorthair stops growing when it turns 3. Its average size is 15 pounds

When do Maine Coons Stop Growing?

One of the biggest cat breeds, the Main Coon stops growing when it reaches the 4 year mark. The average Maine Coon cat weight is 14 lbs.

When do Ragdoll Cats Stop Growing?

Similar to the Maine Coon, the Ragdoll cat stops growing when it is 4 years old and reaches a weight of 10-15 pounds.

It is important to remember that these are averages and other factors can certainly affect when your cat will stop growing as well as its final adult size. For example, if your cat comes from a shelter it is possible that it will not reach average size, as street cats frequently experience stunted growth due to lack of nutrition during their early months.

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Make sure you cat has enough to eat!

In order for your cat to reach its healthy size, it is very important that you give him/her enough to eat. This can sometimes be difficult, especially if your cat is suffering from something like kidney disease. You can check out this article to learn more about how to help a cat with kidney disease gain weight. Below is our recommendation for the best food to feed your cat to help its growth.

Best Value Cat Food on Amazon

Meow Mix Tender Centers Dry Cat Food ($8 for 13.5 lbs of cat food!)

Rachael Ray Nutrish Superfood Blends Dry Cat Food

When are cats full grown?

As you can see above, cats are fully grown between the ages of 1-4 years, depending on the breed.

Maximum Age of Cats

The maximum age of most cat breeds is 16 years old. However, it varies by breed as well whether the cat lives indoors or outdoors. Outdoor cats have a life expectancy of around 13-16 years, whereas outdoor cats have a life expectancy of only 2-5 years.

How long do cats grow?

On average, cats will grow to 46 inches long (18 cm) not including their tail.

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