Boerboel Puppy Weight Calculator

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

Boerboel Breed Profile

Breed Overview

The Boerboel is a powerful and protective mastiff-type breed that originated in South Africa. Bred to guard homesteads and farms against predators, the Boerboel (pronounced “boo-r-bull”) is known for its strength, intelligence, and unwavering loyalty. This working dog has a calm, confident demeanor but is naturally wary of strangers, making it an exceptional guardian and family protector.

Despite their imposing appearance, Boerboels are affectionate with their family and can be gentle with children when properly socialized. Due to their size and guarding instincts, they thrive in homes with experienced owners who can offer firm, consistent training and leadership.

Size Category: Giant

Boerboels are a giant breed, with adult males typically weighing 140–180 pounds and females 110–150 pounds. They stand between 22 to 27 inches tall at the shoulder. Because of their substantial size and rapid early growth, monitoring their development is essential to ensure healthy joint and bone formation, avoid obesity, and prevent stress on growing limbs and hips.

Boerboel Growth Chart & Weight Ranges

Boerboels grow rapidly in the first year but continue to mature physically until about 2 years old. Below is a general weight guide by age.

Age	Male Weight (lbs)	Female Weight (lbs)
4 weeks	8 – 12	7 – 10
8 weeks	18 – 25	15 – 22
3 months	40 – 50	35 – 45
4 months	50 – 65	45 – 60
6 months	75 – 95	65 – 85
9 months	95 – 115	85 – 105
12 months	110 – 135	100 – 125
18–24 months	140 – 180	110 – 150

Gender Differences:
Males tend to be 20–30 pounds heavier than females and may grow slightly taller and more muscular, especially around the neck and shoulders.

How Much Bigger Will My Boerboel Puppy Get?

Boerboel puppies grow rapidly between 2 to 6 months, reaching about 50% of their adult weight by 4 to 5 months of age. By 12 months, most will have achieved 80–90% of their final size, but Boerboels often continue to gain mass, muscle, and chest width until 18–24 months.

Rule of Thumb

To estimate your Boerboel’s adult weight:
Double their weight at 16 weeks and add 10–20%.

Example: A 55 lb puppy at 4 months may reach 120–135 lbs as an adult.

Note: As a giant breed, full maturity can take up to 2 years, especially for males.

Boerboel Growth Tips

Nutrition

• Feeding Schedule: Feed 3–4 meals daily until 6 months, then transition to 2 meals per day.
• Food Type: Use a giant breed puppy formula with controlled calcium and phosphorus levels to support bone growth and reduce the risk of joint issues.
• Avoid Overfeeding: Do not encourage rapid weight gain—it increases the risk of orthopedic problems like hip and elbow dysplasia.

Exercise

• Age-Appropriate Activity: Encourage low-impact play, short walks, and mental stimulation until at least 12–15 months.
• Limit Strain: Avoid jumping, running on hard surfaces, or climbing stairs excessively during the first year.
• Socialization & Training: Early obedience and exposure to different environments help manage their strong guarding instincts.

Health Watch

Common growth and health concerns in Boerboels include:

• Hip and Elbow Dysplasia: Regular vet check-ups and maintaining a healthy weight can reduce the risk.
• Panosteitis (growing pains): Monitor for lameness that shifts from leg to leg.
• Bloat (Gastric Torsion): Feed smaller meals and avoid exercise around feeding times to reduce the risk.