How big does an American Staffordshire Terrier get?
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A full-grown American Staffordshire Terrier is a medium dog, weighing about 40–70 lb as an adult.
- Adult weight
- 40–70 lb
- Also in kilograms
- 18.1–31.8 kg
- Size class
- Medium
As a medium breed, an American Staffordshire Terrier reaches its adult weight earlier than a large dog — smaller breeds finish growing sooner (Hawthorne et al., 2004).
Common questions
How much does a full-grown American Staffordshire Terrier weigh?
An American Staffordshire Terrier weighs 40–70 lb (18.1–31.8 kg) as an adult. That range is the weight the American Kennel Club publishes in the breed's official standard, re-checked here every week — it is a typical weight across many adult dogs, not a target for one dog.
Is an American Staffordshire Terrier a medium dog?
Yes — an American Staffordshire Terrier counts as a medium breed, going by the middle of its adult weight range (18.1–31.8 kg). The cut-offs between small, medium, large and giant are a common veterinary convention rather than one official standard, so a breed near a boundary can be described either way elsewhere.
When does an American Staffordshire Terrier stop growing?
Earlier than a large dog. Hawthorne et al. (2004) measured that smaller breeds finish growing sooner, so an American Staffordshire Terrier reaches something close to its adult weight before a big breed would. We don't publish a month-by-month figure, because no source gives one breed by breed — and an invented number would be worse than none.
Why is there a range instead of one weight?
Because the source publishes a range. Within any breed, weight varies with sex, genetics, build and health, and a mixed-breed dog usually falls between its parents' breeds. Narrowing 40–70 lb down to a single number would look more precise while being less true.
Breeds of a similar size
Weight varies within the American Staffordshire Terrier by sex, genetics and health, and mixed-breed dogs fall between their parents. This is a typical range, not a guarantee.
Verified on . Based on Breed weights — official AKC breed standards (American Kennel Club, breed pages, accessed 2026-07-29) and Body-Weight Changes during Growth in Puppies of Different Breeds (Hawthorne et al., Journal of Nutrition, 2004, vol. 134, p. 2027S). See the method.