Border Collie age in human years
The Border Collie is a medium breed weighing 30–55 lb, with a typical life expectancy of 12–15 years. On the size-based vet chart, a 5-year-old Border Collie is about 36 in human years, and the breed is usually considered senior from around 10 years old. It belongs to the Herding group.
Enter an age to see human years.
The default is the size-based vet chart. See how pet age is calculated.
Border Collie facts
- Size
- Medium (21–50 lb)
- Weight
- 30–55 lb
- Life expectancy
- 12–15 years
- Senior from
- About 10 years old
- Breed group
- Herding
Border Collie age in human years
| Dog age | Medium | Life stage |
|---|---|---|
| 1 year | 15 | Young adult |
| 2 years | 24 | Young adult |
| 3 years | 28 | Mature adult |
| 4 years | 32 | Mature adult |
| 5 years | 36 | Mature adult |
| 6 years | 42 | Mature adult |
| 7 years | 47 | Mature adult |
| 8 years | 51 | Mature adult |
| 9 years | 56 | Mature adult |
| 10 years | 60 | Mature adult |
| 11 years | 65 | Senior |
| 12 years | 69 | Senior |
| 13 years | 74 | Senior |
| 14 years | 78 | Senior |
| 15 years | 83 | Senior |
| 16 years | 87 | Senior |
| 17 years | 91 | Senior |
The default is the size-based vet chart. See how pet age is calculated.
Other medium dog breeds
FAQ
How old is a Border Collie in human years?
The Border Collie is a medium breed weighing 30–55 lb, with a typical life expectancy of 12–15 years. On the size-based vet chart, a 5-year-old Border Collie is about 36 in human years, and the breed is usually considered senior from around 10 years old. It belongs to the Herding group.
How old is a 3-year-old Border Collie in human years?
About 28, using the vet chart for medium dogs. A 10-year-old Border Collie is about 60.
What is the life expectancy of a Border Collie?
Most live 12–15 years.
When is a Border Collie considered a senior?
From around 10 years old, the last quarter of its expected lifespan. That is about 61 in human years.