Bull Terrier Puppy Weight Calculator

Calculate the adult weight for your Bull Terrier. Just type your puppy’s current weight and age, and see how big your puppy gets.

Bull Terrier Growth Guide and Breed Profile

Breed Overview

The Bull Terrier is a strong, spirited breed developed in 19th-century England by crossing Bulldogs with various terriers. Originally bred for fighting and later refined for companionship, Bull Terriers are now known for their distinctive egg-shaped head, muscular build, and mischievous yet loving personality. They are intelligent, fearless, and loyal, making them devoted pets for active and experienced dog owners.

Bull Terriers fall into the medium-to-large breed category, typically weighing between 50–70 pounds. Due to their dense muscle mass and fast growth spurts, tracking their development is vital to avoid bone and joint issues, obesity, or other health concerns related to improper growth rates.

Bull Terrier Growth Chart & Weight Ranges

Here is a general growth chart for Bull Terrier puppies. Keep in mind that growth rates may vary depending on genetics, diet, and activity levels.

Age	Weight Range (Male)	Weight Range (Female)
4 weeks	5–7 lbs	4–6 lbs
8 weeks	12–16 lbs	10–14 lbs
3 months	20–28 lbs	18–25 lbs
4 months	26–34 lbs	24–30 lbs
6 months	36–50 lbs	32–45 lbs
9 months	44–60 lbs	40–55 lbs
12 months	50–70 lbs	45–65 lbs

Note: Males tend to weigh 5–10 lbs more than females, especially in adulthood.

How Much Bigger Will My Bull Terrier Puppy Get?

Most Bull Terrier puppies reach 50% of their adult weight by around 4–5 months. Their growth continues steadily through the first year, though muscle development and chest broadening may continue until 18 months.

Rule of thumb:

Double your Bull Terrier puppy’s weight at 16 weeks to estimate their adult size.

Though they’re not classified as a giant breed, Bull Terriers mature slowly, especially in terms of muscle mass and body structure.

Bull Terrier Growth Tips

Nutrition

Bull Terrier puppies need high-quality, protein-rich food to support their muscular frame.

• Feed a puppy formula designed for medium or large breeds with balanced calcium and phosphorus.
• Puppies should eat 3–4 meals per day until 6 months old, then switch to 2 meals daily.
• Monitor calorie intake carefully—Bull Terriers are prone to obesity if overfed.

Check with your vet for specific caloric needs based on activity level. For guidance, consult AKC’s puppy feeding resources.

Exercise

Bull Terriers are energetic and thrive with regular activity, but growing puppies need careful exercise management.

• Provide moderate daily play and short walks.
• Avoid long runs or jumping until the growth plates close, typically around 12–15 months.
• Include mental enrichment—Bull Terriers love puzzle toys and training sessions.

Health Watch

Bull Terriers can be prone to growth-related and genetic issues:

• Hip dysplasia – maintain a healthy weight to reduce joint stress.
• Luxating patellas – common in dogs with strong, short limbs.
• Deafness – especially in white-coated Bull Terriers (common at birth).
• Skin allergies – monitor for reactions to food or the environment.

Schedule regular vet visits to monitor joint health, weight, and developmental milestones. Early detection and responsible breeding can reduce many of these risks.