Border Collie Weight Chart & Growth Guide
Track your Border Collie's weight from puppyhood to adulthood with this complete age-by-age weight guide.
Track your Border Collie's weight in the free PetNoter app
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Border Collie Weight Chart by Age
Adult Border Collies typically weigh 12–20 kg (27–44 lbs). Males are usually 2–4 kg heavier than females.
| Age | Weight |
|---|---|
| 8 weeks | 1.5–3.5 kg (3–8 lbs) |
| 3 months | 4–7 kg (9–15 lbs) |
| 6 months | 8–13 kg (18–29 lbs) |
| 9 months | 10–17 kg (22–37 lbs) |
| 12 months | 11–19 kg (24–42 lbs) |
| Adult (1+ yr) | 12–20 kg (27–44 lbs) |
Is your Border Collie a healthy weight?
Enter your Border Collie's age and current weight to compare it against the range in the chart above.
Compare Border Collies against other breeds in the dog weight calculator →
These ranges are typical values for the breed, not a diagnosis. Individual healthy weight depends on frame, build and health history — ask your vet about your own pet.
You know the numbers. Now watch the trend.
A single weigh-in tells you very little — a chart of the last six months tells you everything. PetNoter keeps your Border Collie's weight history in one place, free.
- Log a weigh-in in seconds and see the trend line
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About the Border Collie
The Border Collie is widely regarded as the most intelligent dog breed in the world. Originally developed along the Anglo-Scottish border for herding sheep, these medium-sized dogs are known for their intense stare (the "eye"), remarkable agility, and tireless work ethic.
Border Collies excel at virtually every dog sport — agility, flyball, obedience, and herding trials — and they need a significant amount of both physical and mental stimulation to thrive. Without it, they can develop obsessive behaviors and anxiety.
Due to their athleticism, Border Collies tend to stay lean naturally when given adequate exercise. However, a pet Border Collie with limited activity may gain weight over time. Their dense coat can mask weight changes, making regular monitoring important.
Keeping Your Border Collie at a Healthy Weight
- Provide 1–2 hours of vigorous exercise daily, ideally with herding, agility, or off-leash running.
- Feed a high-protein, moderate-fat diet formulated for active breeds.
- Adjust food intake based on seasonal activity changes — they may need less in winter.
- Keep treats to under 10% of daily calories; use kibble pieces for training.
- Weigh quarterly — their lean build means a few extra kilograms is very noticeable and concerning.
- Brush their coat regularly to feel for hidden weight changes beneath the fur.
Frequently Asked Questions
Related Weight Charts
Track your Border Collie's weight in the free PetNoter app
4.8 · Free · Android & iOS