Collie age in human years
The Collie is a large breed weighing 50–75 lb, with a typical life expectancy of 12–14 years. On the size-based vet chart, a 5-year-old 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.
Collie facts
- Size
- Large (51–100 lb)
- Weight
- 50–75 lb
- Life expectancy
- 12–14 years
- Senior from
- About 10 years old
- Breed group
- Herding
Collie age in human years
| Dog age | Large | Life stage |
|---|---|---|
| 1 year | 15 | Puppy |
| 2 years | 24 | Young adult |
| 3 years | 28 | Mature adult |
| 4 years | 32 | Mature adult |
| 5 years | 36 | Mature adult |
| 6 years | 45 | Mature adult |
| 7 years | 50 | Mature adult |
| 8 years | 55 | Mature adult |
| 9 years | 61 | Mature adult |
| 10 years | 66 | Senior |
| 11 years | 72 | Senior |
| 12 years | 77 | Senior |
| 13 years | 82 | Senior |
| 14 years | 88 | Senior |
| 15 years | 93 | Senior |
| 16 years | 99 | Senior |
The default is the size-based vet chart. See how pet age is calculated.
Other large dog breeds
FAQ
How old is a Collie in human years?
The Collie is a large breed weighing 50–75 lb, with a typical life expectancy of 12–14 years. On the size-based vet chart, a 5-year-old 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 Collie in human years?
About 28, using the vet chart for large dogs. A 10-year-old Collie is about 66.
What is the life expectancy of a Collie?
Most live 12–14 years.
When is a Collie considered a senior?
From around 10 years old, the last quarter of its expected lifespan. That is about 65 in human years.