Also recognized as AmStaffs and American Staffies, American Staffordshire Terriers have been acquiring in popularity as people start to know that your aggressive call stems just from lousy ownership. In fact, AmStaffs room loyal, playful dogs who love come be about people.

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Our comfortable interactive puppy growth chart and calculator takes all the tough work out of predicting your puppy’s potential adult size. This helps you to know precisely what you room in for.

Most civilization compare Staffies come the slightly bigger American Pit Bull, and also they perform share many similarities. However, these two dogs have actually been bred separately for an ext than 50 years and also so are taken into consideration distinct breeds. If you have embraced one of this pups, you might be wondering how huge American Staffordshire Terriers get.

American Staffordshire Terrier size Predictions through Age

Confident, smart, and also good-natured American Staffies room medium-sized, muscular dogs that call for a many loving attention. Your slightly stubborn and also dominant nature means that castle are more than likely not a great pick because that a novice owner. They require quite a certain hand, are very strong, and can it is in a tiny aggressive towards various other dogs.

However, with the appropriate person, AmStaffs make wonderful pets. They are intelligent and eager to please those castle love, which makes them extremely trainable. Past that, lock are full family dog who simply want come be approximately people as much as possible – best while out and around getting many of exercise and also mental stimulation.


Generally speaking, American Staffordshire Terriers room classified as medium-sized dogs. Still, they are incredibly stocky, usually weighing more than Pit Bulls in spite of being smaller. Let’s take it a closer look at their potential adult size and how quickly they obtain there:

Age3 months6 months1 yearAdult
Weight23 – 32 lbs40 – 59 lbs40 – 70 lbs40 – 70 lbs
Height8 – 10 inches15 – 18 inches16 – 19 inches17 – 19 inches

*A dog’s height is measured from its withers – this is the allude between the shoulder blades.

American Staffies do a fair little of cultivation in the very first three month of your lives, reaching half their adult height, yet only around 30% of your adult weight. By the moment they gain to 6 months, though, girlfriend should have actually a same idea of her pup’s mature size as they will certainly be around 85% of their complete height and also 70% the their total weight through then. Back AmStaffs have actually usually accomplished their adult height by 12 months, they will continue to rise in weight till they are somewhere in between 16 and 19 months.

Are There different Sizes the American Staffordshire Terrier?

There has tendency to be part slight size variations between the males and females the this breed, v males often being 18 come 19 inches and also 60 to 70 pounds if females are 17 to 18 inches and also 40 to 50 pounds.

While there room no main tiny or teacup versions of these dogs, over there is an additional very comparable breed called the Staffordshire Bull Terrier. This dogs room slightly smaller at 14 to 16 inches and significantly much less bulky 24 come 38 pounds.

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Beyond that, Staffies are closely related to numerous other ‘Pit Bull’ breeds such as Bull terriers, Bulldog, Miniature Bull Terrier, Boxer. Countless of these have actually smaller versions well-known as ‘Pocket Pitbulls,’ i m sorry are approximately 10 and 16 inches tall and also weigh somewhere between 10 to 30 pounds.

American Staffordshire Terrier development Patterns

As with many other dogs, American Staffies obtain to approximately three-quarters of your adult dimension by the time they are 6 months old. ~ this, their development slows significantly. Usually, castle will get to their adult height around their an initial birthday but will proceed to increase in muscle fixed much beyond that. Their mature load will rely on their diet and task levels as much as your genetics.

How large is a Full-Grown American Staffordshire Terrier?

An adult American Staffordshire Terrier will be around 17 to 19 inches and also weigh between 40 come 70 pounds. Their particular height and weight will vary based on their gender and also how big the parent dogs to be – and also nutrition and also lifestyle (as covered above). Masculine dogs have tendency to it is in on the bigger side contrasted to your female counterparts.


American Staffordshire Terriers usually get to half their total weight about 4 – 5 months and their adult dimension at approximately 18 months.

You have the right to calculate their potential adult load at 23 weeks by acquisition what they sweet at the age and multiplying that by two.

A various formula you might use is:

Growth = existing weight / existing age in weeksAdult load = development x 52 (number of main in one year)

So, because that example, if your 12-week old pup weighs 18 pounds. You simply divide the current weight through their age in weeks and multiply the result with 52:

18/ 12 = 1.51.5 x 52= 78 pounds

78 pounds would certainly be the intended weight of your adult-sized American Staffordshire Terrier.

What age is an American Staffordshire Terrier completely Grown By?

While her AmStaff will likely be in ~ their complete height by 12 month old, they are not considered completely grown until they with both their adult height and weight. Dog generally always continue to increase in weight beyond this time together they obtain muscle mass. This is an especially the instance for stocky dog such as the Staffy. Canine professionals would consider one that these dog to be in ~ their full size by the time they fight 19 months (just over a year and a half).

While American Staffordshire Terriers make great pets for the right kind that family, there are a couple of things to consider. Firstly, they need firm and also consistent cultivate from very early age. Secondly, they frequently don’t perform so well roughly other animals because of their fighting dog heritage.

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You might also be concerned about your AmStaff puppy’s potential adult size. When it’s constantly best to have a nice big yard because that these energetic pups, they are actually medium-sized dogs and do well even in smaller homes. If you do have room for among these delightful pooches in your home and also in your heart, friend won’t be sorry.