Border Collie weight by age
Typical weight by age for a Border Collie with an adult weight of about 42 lb (male) or 42 lb (female). The range shows where most puppies fall.
| Age | Male | Female |
|---|---|---|
| 2 months | 9.0 lbrange 6.2–12 lb | 9.0 lbrange 6.2–12 lb |
| 3 months | 14 lbrange 10–19 lb | 14 lbrange 10–19 lb |
| 4 months | 20 lbrange 15–25 lb | 20 lbrange 15–25 lb |
| 5 months | 26 lbrange 21–32 lb | 26 lbrange 21–32 lb |
| 6 months | 30 lbrange 25–36 lb | 30 lbrange 25–36 lb |
| 8 months | 36 lbrange 30–41 lb | 36 lbrange 30–41 lb |
| 10 months | 38 lbrange 33–43 lb | 38 lbrange 33–43 lb |
| 12 months | 40 lbrange 35–44 lb | 40 lbrange 35–44 lb |
Divide pounds by 2.2 for kilograms.
Adult weight
AKC breed page: 30-55 pounds. The calculator uses about 42 lb for males and 42 lb for females as the typical adult weight.
Common questions
How much should a Border Collie puppy weigh at 3 months?
A typical male Border Collie weighs about 14 lb at 3 months (most between 10 and 19 lb). A typical female weighs about 14 lb (most between 10 and 19 lb).
How much should a Border Collie puppy weigh at 6 months?
A typical male Border Collie weighs about 30 lb at 6 months (most between 25 and 36 lb). A typical female weighs about 30 lb (most between 25 and 36 lb).
How much does a Border Collie weigh at 1 year?
A typical male Border Collie weighs about 40 lb at 12 months (most between 35 and 44 lb). A typical female weighs about 40 lb (most between 35 and 44 lb).
When does a Border Collie stop gaining weight?
The typical Border Collie puppy reaches about 90% of its adult weight around 10 months and 95% around 14 months. Large and giant breeds fill out for longer than small ones.
How accurate is the Border Collie weight calculator?
Across our test dogs the typical miss was about 11% of adult weight, smaller for older puppies. Your puppy can land outside the range. See the methods page.
Other breeds
- Australian Cattle Dog
- Nova Scotia Duck Tolling Retriever
- Bulldog
- English Springer Spaniel
- Keeshond
- Standard Schnauzer
Weight standard: AKC breed page. Growth curves: our analysis of open data from Salt et al. (2017), CC BY 4.0. An estimate, not veterinary advice. Methods.