American Staffordshire Terrier Weight Chart
Expected adult weight, growth by age and a calculator for your American Staffordshire Terrier puppy. AKC weight: males 55 to 70 lb (25 to 32 kg), females 40 to 55 lb (18 to 25 kg).
- Male, AKC
- 55 to 70 lb (25 to 32 kg)
- Female, AKC
- 40 to 55 lb (18 to 25 kg)
- Growth-chart size class
- Medium
Predict your American Staffordshire Terrier puppy's adult weight
Enter your puppy's age and weight to see an estimate.
Not veterinary advice. PuppySizer gives estimates from published sources. It cannot examine your pet. For any health concern, ask your own veterinarian. Read the full disclaimer.
American Staffordshire Terrier male growth chart
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| Age | Typical male (lb) | Lower end of AKC range (lb) | Upper end of AKC range (lb) |
|---|---|---|---|
| 12 weeks | 18.2 | 15.1 | 17.6 |
| 16 weeks | 26.0 | 21.9 | 26.5 |
| 20 weeks | 33.9 | 29.0 | 35.3 |
| 26 weeks | 44.0 | 38.0 | 46.4 |
| 40 weeks | 56.0 | 49.0 | 61.4 |
| 52 weeks | 59.4 | 52.0 | 65.1 |
| 78 weeks | 61.7 | 54.1 | 67.6 |
| 104 weeks | 62.5 | 55.0 | 70.0 |
The curve ends at 63 lb (28 kg), the middle of the AKC range. On this curve a male reaches half of adult weight at about 19 weeks (4 months), 90 % at about 41 weeks (9 months) and 95 % at about 52 weeks (12 months).
American Staffordshire Terrier female growth chart
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| Age | Typical female (lb) | Lower end of AKC range (lb) | Upper end of AKC range (lb) |
|---|---|---|---|
| 12 weeks | 14.2 | 11.4 | 16.8 |
| 16 weeks | 20.1 | 16.4 | 23.6 |
| 20 weeks | 26.1 | 21.5 | 30.4 |
| 26 weeks | 33.1 | 27.5 | 38.5 |
| 40 weeks | 41.5 | 34.7 | 48.0 |
| 52 weeks | 44.1 | 37.0 | 50.9 |
| 78 weeks | 46.3 | 38.9 | 53.5 |
| 104 weeks | 47.5 | 40.0 | 55.0 |
The curve ends at 48 lb (22 kg), the middle of the AKC range. On this curve a female reaches half of adult weight at about 18 weeks (4 months), 90 % at about 45 weeks (10 months) and 95 % at about 62 weeks (14 months).
American Staffordshire Terrier weight by age
| Age | Male | Female |
|---|---|---|
| 12 weeks (3 mo) | 18.2 lb / 8.3 kg | 14.2 lb / 6.4 kg |
| 16 weeks (4 mo) | 26 lb / 11.8 kg | 20 lb / 9.1 kg |
| 20 weeks (5 mo) | 34 lb / 15.4 kg | 26 lb / 11.8 kg |
| 26 weeks (6 mo) | 44 lb / 19.9 kg | 33 lb / 15.0 kg |
| 40 weeks (9 mo) | 56 lb / 25 kg | 42 lb / 18.8 kg |
| 52 weeks (12 mo) | 59 lb / 27 kg | 44 lb / 20.0 kg |
| 78 weeks (18 mo) | 62 lb / 28 kg | 46 lb / 21 kg |
| 104 weeks (24 mo) | 63 lb / 28 kg | 48 lb / 22 kg |
Typical healthy dog, from the shape of the Salt et al. (2017) chart for the medium size class, scaled to the AKC weight. Healthy puppies vary around these values.
American Staffordshire Terrier size questions
How big does a American Staffordshire Terrier get?
The American Kennel Club gives 55 to 70 lb (25 to 32 kg) for males and 40 to 55 lb (18 to 25 kg) for females. Individual dogs can fall outside a breed range, and a mix or a dog from working lines may be larger or smaller.
When is a American Staffordshire Terrier fully grown?
On this curve a male reaches half of adult weight at about 19 weeks (4 months), 90 % at about 41 weeks (9 months) and 95 % at about 52 weeks (12 months). On this curve a female reaches half of adult weight at about 18 weeks (4 months), 90 % at about 45 weeks (10 months) and 95 % at about 62 weeks (14 months). These ages come from the shape of the published growth chart for medium dogs, scaled to the AKC weight, so they describe a typical dog, not a particular one.
How much should a American Staffordshire Terrier puppy weigh at 6 months?
A typical male is about 44 lb (19.9 kg) and a female is about 33 lb (15.0 kg) at 26 weeks on this curve. The range for healthy puppies is wide, so use the calculator above with your own puppy’s weight.
Other breeds in the same size class
Sources
- AKC breed pages (weight line only). American Kennel Club. Read 2026-11-08. Used for: Breed weight ranges, as numbers only. No AKC text is reproduced.
- Growth standard charts for monitoring bodyweight in dogs of different sizes. Salt C, Morris PJ, Wilson D, Lund EM, German AJ. PLoS ONE 12(9): e0182064 (CC BY 4.0). Read 2026-11-08. Used for: Centile growth curves for five size classes (adult weight under 40 kg) from 12 weeks to 2 years, built from Banfield Pet Hospital records. We read the values off the published charts.
AKC weight read on 2026-11-08 from akc.org/dog-breeds/american-staffordshire-terrier (numbers only). Facts last checked November 8, 2026.