- Dog breeds
- Medium breed
- Terrier group
- Origin: England (Staffordshire)
The Staffordshire Bull Terrier is a muscular, medium-sized terrier known for its devotion to people. The AKC breed standard sets a height of 14–16 in and weights of 28–38 lb for males and 24–34 lb for females. Most Staffies reach adult weight at around 12–14 months. This page includes a Staffordshire Bull Terrier growth chart by age, a size calculator preset for the breed, and sourced guidance on lifespan, health, exercise and feeding.
How big do Staffordshire Bull Terriers get?
According to the AKC breed standard, adult male Staffordshire Bull Terriers weigh 28–38 lb (12.7–17.2 kg) and stand 14–16 in (36–41 cm) at the shoulder. Females are a little smaller at 24–34 lb (10.9–15.4 kg). That makes the Staffordshire Bull Terrier a Medium breed on our size scale.| Staffordshire Bull Terrier | Weight | Height |
|---|
Many healthy pets fall outside the show standard, especially from working or pet lines. Use body condition, not the scale alone, to judge a healthy weight.
Staffordshire Bull Terrier growth chart: weight by age
| Age | Male | Female |
|---|---|---|
| 8 weeks | 7.9 lb3.6 kg | 7 lb3.2 kg |
| 3 months | 13 lb6 kg | 12 lb5.3 kg |
| 4 months | 17 lb7.9 kg | 15 lb6.9 kg |
| 6 months | 22 lb10 kg | 19 lb8.8 kg |
| 9 months | 28 lb12.7 kg | 25 lb11.1 kg |
| 12 months | 32 lb14.5 kg | 28 lb12.8 kg |
| Adult (12–14 months) | 33 lb15 kg | 29 lb13.2 kg |
When is a Staffordshire Bull Terrier full grown?
Medium breeds like the Staffordshire Bull Terrier reach their adult weight at about 12–14 months. Most of the growth happens early: by 6 months a typical male is around 22 lb and a female around 19 lb, after which weight gain slows down as the dog fills out.How we calculate this: each figure is the midpoint of the breed’s adult weight range multiplied by the share of adult weight a medium-size puppy typically reaches at that age (WALTHAM growth standards, Salt et al., 2017). It is the same model used by our Dog Size Calculator.
Staffordshire Bull Terrier puppy size calculator
Enter your puppy’s current age and weight to estimate how big your Staffordshire Bull Terrier will be as an adult. The calculator is preset for the breed.Dog Size Calculator
Predict how big your puppy will get — estimated adult weight from its current age and weight.
Best from ~8 weeks on; very young pups are less predictable.
Weigh on a flat scale, ideally before a meal.
Not sure? Use the size of the parents, or the larger parent for a mixed breed.
Males often finish a little heavier than females.
| Age milestone | Projected weight |
|---|
Dog breed weight chart (lb & kg) by size
| Size | Adult weight | Full-grown | Example breeds |
|---|---|---|---|
| Toy | 2–12 lb / 1–5.5 kg | ~8–10 mo | Chihuahua, Maltese, Toy Poodle, Pomeranian, Yorkie |
| Small | 12–25 lb / 5.5–11 kg | ~10–12 mo | Shih Tzu, French Bulldog, Mini Schnauzer, Mini Aussiedoodle |
| Medium | 25–50 lb / 11–23 kg | ~12–14 mo | Beagle, Border Collie, Cocker Spaniel, Std. Aussiedoodle* |
| Large | 50–100 lb / 23–45 kg | ~15–18 mo | Labrador, Golden Retriever, German Shepherd, Boxer |
| Giant | 100 lb+ / 45 kg+ | ~18–24 mo | Great Dane, Mastiff, St Bernard, Newfoundland |
*Standard Aussiedoodles span medium–large (≈40–70 lb / 18–32 kg); Mini Aussiedoodles are small (≈15–35 lb / 7–16 kg).
How it works: puppies of a given size reach a predictable share of their adult weight at each age. The tool divides your puppy's current weight by that share to estimate the adult figure, shown as a range.
Disclaimer: estimates for planning only — not veterinary advice. Growth varies with genetics, sex, nutrition and neuter status, especially for mixed and giant breeds. Keep records and consult your vet.
Sources: Salt et al., PLOS ONE 2017 (WALTHAM growth standards) · AKC — when puppies finish growing
Staffordshire Bull Terrier temperament and personality
Staffies are affectionate, playful and very people-oriented, and they are usually gentle and patient with children in their family. They are brave and tenacious, and some can be intolerant of unfamiliar dogs, so early socialization and supervision around other dogs are important. They are strong for their size and need consistent training and daily exercise.-
Energy level4/5
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Trainability3/5
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Good with children5/5
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Shedding2/5
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Barking2/5
Ratings are BarnCalc’s own 1–5 scale, based on the breed standard and the sources cited below. Individual dogs vary.
History and origin
The breed was developed in 19th-century England from Bulldog and terrier crosses, originally for blood sports and ratting. After these sports were banned, working people in the Black Country, around Staffordshire, kept the dogs as companions and refined their temperament. The Kennel Club in Britain recognized the breed in 1935, and the AKC followed in 1974.Staffordshire Bull Terrier lifespan and health
Most Staffordshire Bull Terriers live 12–14 years. Want to know how old that is in human terms? Try our dog years calculator, or estimate an individual dog’s outlook with the dog life expectancy calculator.Health conditions documented in the breed
- Hereditary cataracts
- L-2-hydroxyglutaric aciduria (a metabolic brain disorder)
- Hip and elbow dysplasia
Health tests to ask a breeder for
The breed’s parent club recommends these screenings for breeding dogs (ask to see the results for both parents):- Eye exam by a board-certified ophthalmologist
- Hip evaluation
- Elbow evaluation
- Hereditary cataract (HC) DNA test
- L-2-HGA DNA test
This is general information, not veterinary advice. Talk to your vet about your own dog.
Exercise and grooming
| Exercise | 1 hour of walks and play a day |
| Grooming | Weekly brushing |
| Coat | Smooth, short and close |
| Low shedding | No – light to moderate shedder |
| Apartment living | Good |
How much should a Staffordshire Bull Terrier eat?
A healthy, neutered adult Staffordshire Bull Terrier weighing 24–38 lb needs roughly 670–950 kcal a day. With a typical dry food of about 375 kcal per cup, that is about 1.8–2.5 cups a day, split into two meals. Active or intact dogs need more, while older or less active dogs need less. Always check the feeding guide on your food’s label.Breeding and pregnancy
Like all dogs, a pregnant Staffordshire Bull Terrier carries her puppies for about 63 days from ovulation. Most females come into heat about every 6 months.Is a Staffordshire Bull Terrier right for you?
A great fit for
Active families with children, owners who want an affectionate, people-loving dog, and city or country homes.Think twice if
Homes with other dogs that may not get along, owners who cannot manage a strong dog, or places with breed-specific restrictions.Staffordshire Bull Terrier FAQ
When is a Staffordshire Bull Terrier full grown?
How big will my Staffordshire Bull Terrier puppy get?
How much should a 6-month-old Staffordshire Bull Terrier weigh?
How long do Staffordshire Bull Terriers live?
Is a Staffordshire Bull Terrier the same as an American Staffordshire Terrier?
Are Staffordshire Bull Terriers good with children?
More dog calculators
- Dog size calculatorHow big will my puppy get?
- Dog years calculatorDog age in human years
- Life expectancyLifespan by breed and size
- Gestation calculatorDue date and whelping window
- Heat cycle calculatorNext heat and fertile days
- Raw dog food calculatorDaily portions by weight
Sources
- AKC official breed standard
- FCI breed standard
- Hill's Pet Nutrition breed profile
- AKC: breed club recommended health tests
- Salt C. et al. (2017), growth standard charts for monitoring bodyweight in dogs of different sizes, PLOS ONE
Main photo: Serial Number 54129, CC BY-SA 4.0, via Wikimedia Commons.
Reviewed by grupo barncalc.com on November 7, 2026. Estimates are for planning only and are not veterinary advice.