American Staffordshire Terrier Weight Chart – Size & Growth Chart

When adopting an American Staffordshire Terrier, you will want to make sure that you know everything about the breed.

This includes what to expect as they grow, how big they can get, and even troubleshooting to get your dog at the right weight.

For some of the information, you can consult an American Staffordshire Terrier weight chart to know what to expect, but there is still a lot more info out there.

We have compiled everything that you should know about the growth and development of this popular breed, including when a dog stops growing, how to know if your dog is the right weight, and all other essential knowledge for American Staffordshire Terrier owners.

When Is An American Staffordshire Terrier Fully Grown? 

American Staffordshire Terrier Fully Grown

Looking at your American Staffordshire Terrier puppy, you might be asking yourself, “when exactly will this puppy stop growing?” It is a common concern since there is a lot of misinformation about this breed out in the world.

In general, you can expect your American Staffordshire Terrier puppy to stop growing between 12 and 18 months old.

Most puppies will reach their final height by their first birthday but will continue to gain weight until they are about 18 months old.

There are some cases where a dog might stop growing a little sooner than that, but with this breed, you can be sure that the dogs will not get any bigger by 18 months.

American Staffordshire Terrier Weight Chart

AgeWeight (kg)Weight (lbs)
3 Months10.6 - 14.3 kg23.4 - 31.5 lbs
4 Months13.9 - 18.8 kg30.6 - 41.4 lbs
5 Months17.2 - 23 kg37.9 - 50.7 lbs
6 Months19.8 - 26.7 kg43.6 - 58.9 lbs
7 Months22.1 - 29.8 kg48.7 - 65.7 lbs
8 Months23.9 - 32.3 kg52.7 - 71.2 lbs
9 Months25 - 34.2 kg55.1 - 75.4 lbs
10 Months26.1 - 35.8 kg57.5 - 78.9 lbs
11 Months26.6 - 36.9 kg58.6 - 81.3 lbs
12 Months27 - 37.8 kg59.6 - 83.2 lbs

Using an American Staffordshire Terrier weight chart will help you in a lot of different ways as a dog owner. A weight chart is a good way to gauge how much bigger your dog is likely to get, as long as he stays on his growth curve.

A growth curve is the speed at which your dog grows. That means that even if your dog is smaller than the American Staffordshire Terrier, as long as he is growing consistently along his curve, there is nothing to worry about.

A weight chart can also give you an idea of where your dog is at when compared to averages. If your dog is significantly off of the weight chart, you can ask your veterinarian if there is anything to be worried about.

To use a weight chart, you find the age of your puppy in months and then find your puppy’s weight.

There is a line that goes across the chart that indicates the average size of an American Staffordshire Terrier at that age, divided between males and females.

Where you are compared to the line will help you determine whether your dog is growing correctly. If your dog falls below the line, you know he is smaller than average for his age.

American Staffordshire Terrier Growth Chart – What To Expect

American Staffordshire Terrier Diet

Birth – 2 Weeks

At birth, you can expect that your American Staffordshire Terrier puppy will not weigh very much. They are generally less than a pound when they are born, depending a lot on the genetics of the mother and how many pups she is carrying.

The more pups the mother has, the smaller the puppies are when they are born, in general. They usually can reach 2 pounds by 2 weeks old. 

3 Weeks – 12 Weeks

Between the age of 3 weeks and 12 weeks, your American Staffordshire Terrier puppy is going to experience a major growth spurt.

While at around 3 weeks old, the average American Staffordshire Terrier puppy is somewhere between 3 and 4 pounds, they will grow to between 10 and 15 pounds by the time that they are 12 weeks old.

You should also see a big uptick in appetite by the 12-week mark. 

American Staffordshire Terrier Puppy Nutrition

4 Months – 9 Months

When your American Staffordshire Terrier puppy is 4 months old, he should weigh between 15 and 19 pounds, give or take.

But the majority of his growth will happen between the 4 month and 9-month ages. When your puppy is 9 months old, he could weigh anywhere from 25 to 42 pounds.

He should not be done growing by this point, but remember that American Staffordshire Terriers are not very big dogs.  

10 Months – 18 Months

Between 10 and 18 months of age, your puppy will finally slow down on his growth and stop altogether. At 10 months old, the average American Staffordshire Terrier puppy weighs between 25 and 50 pounds.

The dog might still continue to gain a little bit of weight, but that just depends on whether the dog is male or female and what his genetics are.  


Your American Staffordshire Terrier is officially an adult at 18 months old. He should not grow anymore past this point, though it is a stocky breed, so you will need to be mindful of extra weight gain.

The average size for an American Staffordshire Terrier female is between 40 and 70 pounds, where a male American Staffordshire Terrier could weigh between 50 and 70 pounds, all depending on the genetics of the dog. 

How Big Do American Staffordshire Terriers Get? 

In general, the American Staffordshire Terrier dog breed is considered a medium to large breed. They are stout and stocky, but they do not have long legs and are not tall.

As we said above, the average weight for a female American Staffordshire Terrier is between 40 and 70 pounds, while a male is only slightly larger than that.

American Staffordshire Terrier Weight Chart

You might have an American Staffordshire Terrier that is not very big at all. You do not need to worry that your dog is going to turn out into a giant dog; the breed is not that big.

There are a few different methods that you could try in order to work out how big your American Staffordshire Terrier puppy will get.

If you are trying to guess your dog’s adult size, the first thing that you can do is check the weight chart.

If you are able to see your dog’s parents, they will also be a big indicator of size. If your dog’s paws are particularly large, that is another clue that you can go with. Finally, there are some DNA tests out there that could give you more info.

Will Neutering/Spaying My American Staffordshire Terrier Affect His Growth? 

It is incredibly important to spay or neuter your dog. This is done to keep your dog healthy and to prevent any unwanted pregnancies.

Yet, there is a common concern as to whether spaying or neutering a dog will affect his growth.

While spaying or neutering a puppy will not impact his final size, it can impact his growth in other ways. With the removal of hormones, the puppy’s joints will not grow properly, leading to mobility issues when they are older.

For that reason, it is a good idea to wait until your American Staffordshire Terrier is done growing. If your dog is running off and putting himself in danger, it might be better to do it earlier.

American Staffordshire Terrier Height Chart 

If you are wondering how tall your American Staffordshire Terrier puppy will wind up, you can use an American Staffordshire Terrier growth chart to help.

When you are measuring your dog, make sure that he is standing all of the way up on all four paws. Then use a tape measure from the highest point on his back to the ground.

There is not a huge difference between male and female American Staffordshire Terriers. The average height for an adult female is between 17 and 18 inches, while the average height for a male is between 18 and 19 inches.

Staffordshire Bull Terrier vs American Staffordshire Terrier Size 

American Staffordshire Terriers and Staffordshire Bull Terriers are mixed up all of the time. This has to do with their facial appearance and body types. While the breeds might have had some origins that are shared, they are separate breeds.

Looking at the sizes between the two breeds, it is important to note that the Staffordshire Bull Terrier is actually smaller than the American Staffordshire Terrier.

American Staffordshire Terrier Puppy Weight Chart

A Staffordshire Bull Terrier is only 14 to 16 inches in height, on average, and will weigh between 24 and 38 pounds.

They are a true medium-sized dog breed, whereas the American Staffordshire Terrier verges into the large breed category.

Factors That Affect American Staffordshire Terrier Growth 

Genetics & Gender

There are a few factors that determine how big an American Staffordshire Terrier puppy will wind up being.

The first has to do with genetics. If you look at your puppy’s parents, you will get a good clue as to his final size.

While the males of this breed are slightly larger, the size difference is minimal and should not count as a big factor in your puppy’s growth. 


Nutrition is incredibly important when it comes to a growing puppy. You want to set your dog out for a long, healthy life.

Nutrition might not stunt your dog’s growth, but it could harm his joints. If you overfeed your dog, for example, his growing joints and bones will have too much weight to contend with.

Make sure that your dog has a balanced and healthy diet. Look at the ingredients in your dog’s food to see what you are giving him.

Physical Activity & Health

Physical activity is a great way for you to keep your dog from becoming overweight and damaging his growing bones.

Do not over-exercise young puppies, however, or this could be detrimental to their growing bodies. Likewise, keeping your dog healthy will ensure that his body grows up to be just as strong as you want it to be, both on the outside and the inside.

Take your dog on routine walks and keep up appointments with your vet.

What If My American Staffordshire Terrier Is Not The Right Weight 

If you are looking at your dog and are worried that he is not the correct weight, there are some steps that you can take to help your dog’s health.

To determine whether your dog is the right weight for his size, you could use an American Staffordshire Terrier size chart, but you can always just visually gauge it.

If your pup’s ribs are protruding, he is too thin. If you cannot feel his ribs easily under his fur, he is too fat.

To help your dog lose extra weight, you can put him on healthier food and increase the amount of exercise that you provide your dog.

If your dog is too thin, you might want to add in an extra meal for your dog. He might be just burning more calories and going through a growth spurt and needs a little bit extra food.

How Much Does It Cost To Own An American Staffordshire Terrier? 

It is a good idea to know how much it will cost to own an American Staffordshire Terrier before you adopt one.

On average, an American Staffordshire Terrier puppy is likely to cost anywhere from $250 to $1500, depending on the dog and your location.

In the first year, you are looking at around $3500 in potential costs due to vet visits, food, medications, and having your dog spayed or neutered.

American Staffordshire Terrier Development

After the first year, costs should go down to around $1500 a year. In one dog’s lifetime, you can expect to pay a total of $22,000.

American Staffordshire Terrier Genetics And Common Health Problems 

Unfortunately, all breeds have a higher tendency to develop certain health issues. For the American Staffordshire Terrier, these issues include mostly physical ailments, including:

Hip Dysplasia: This is a condition where the hip joint did not grow correctly and limits movement as the dog gets older.

Elbow Dysplasia: Exactly like hip dysplasia, but in the front leg elbows.

Progressive Retinal Atrophy: This is a condition that gradually causes blindness in dogs.

Additionally, there are a couple of other conditions an American Staffordshire Terrier might face, including:

Hypothyroidism: This is where the thyroid does not work properly. It can be treated with medications.

Heart Disease: This can also be treated with medication, but is more dangerous than hypothyroidism.

Some American Staffordshire Terriers also have a tendency to experience allergies to certain foods, but this can be handled by feeding your dog an allergen-free diet. Your dog might not have this at all, however.

Final Words 

American Staffordshire Terriers are a wonderful dog breed to own. They are loving, playful, and incredibly loyal to their humans.

Knowing what to expect from your growing American Staffordshire Terrier puppy is important to help ensure that your dog not only has a loving home but also has a long, healthy life ahead of him.

If you are worried that your puppy is not growing correctly, the best thing for you to do is take him in for a vet visit. Your vet will either be able to ease your mind or provide you with the right type of guidance to get your pup back on track.

Similar Posts