Border Terrier Puppy Weight Calculator

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

Border Terrier Breed Profile

Breed Overview

The Border Terrier originated in the border region between England and Scotland, where it was bred to assist in fox hunts by flushing foxes out of their dens. Bred for hardiness and endurance, the Border Terrier’s wiry coat and small frame helped it navigate rough terrain while keeping up with horses.

Today, this breed is known for its affectionate nature, intelligence, and energetic temperament. Border Terriers are loyal companions that do well in active homes. They are eager to please but also have a bit of an independent streak, a reminder of their working roots.

Size Category: Small

Border Terriers are considered a small breed, typically weighing 11.5 to 15.5 pounds as adults and standing around 10 to 11 inches tall. While they mature more quickly than large breeds, tracking their growth is still important to ensure they are developing at a healthy rate—especially during puppyhood, when proper nutrition and growth support lifelong health.

Border Terrier Growth Chart & Weight Ranges

Here’s a typical growth chart for Border Terrier puppies. Individual variation is normal, but this chart provides general guidance:

Age	Male Weight (lbs)	Female Weight (lbs)
4 weeks	2 – 3	1.5 – 2.5
8 weeks	4 – 5.5	3.5 – 5
3 months	6 – 8	5 – 7
4 months	7 – 9.5	6 – 8.5
6 months	9 – 12.5	8 – 11
9 months	10 – 14	9 – 13
12 months	11.5 – 15.5	11 – 14.5

Gender Differences:
Males are usually 1 to 2 pounds heavier than females and may appear slightly stockier.

How Much Bigger Will My Border Terrier Puppy Get?

Most Border Terrier puppies will reach 50% of their adult weight by 3 to 4 months old. They typically reach their full adult size by around 10 to 12 months, although muscle tone and coat maturity may continue to develop into the second year.

Rule of Thumb

To estimate adult weight:
Double your puppy’s weight at 16 weeks for a rough adult weight projection.

Example: A 6-pound Border Terrier at 4 months may grow to weigh around 12 pounds as an adult.

Because they’re a small breed, Border Terriers do not require extended growth tracking like large or giant breeds, but sudden weight changes or growth plate issues still merit veterinary attention.

Border Terrier Growth Tips

Nutrition

• Feeding Schedule: Offer 3 meals daily until 6 months old, then transition to 2 meals a day.
• Food Type: Use a high-quality small-breed puppy formula with balanced protein and fat to support growth.
• Watch Weight: Border Terriers are prone to obesity, so avoid overfeeding and minimize treats.

Exercise

• Daily Activity: Provide moderate activity such as walks, short games of fetch, and mental stimulation.
• Avoid Overexertion: While energetic, puppies should not overexert—avoid long hikes or stairs during early growth months.
• Enrichment: Puzzle toys and early training sessions help meet their mental energy needs.

Health Watch

Although generally healthy, Border Terriers can be prone to:

• Hip dysplasia (rare, but can occur)
• Patellar luxation (knee instability)
• Dental issues—regular brushing and dental checks are key

Keep an eye on growth rate, posture, and mobility. Rapid weight gain or lethargy should be evaluated by your vet.