Medium dog
Australian Shepherd age in human years
Enter your Australian Shepherd's age to see its human-year equivalent, life stage, and lifespan.
Frequently asked questions
How old is a Australian Shepherd in human years?+
It depends on the dog's age and size. Enter your Australian Shepherd's age above. We use a size-based model (not the inaccurate "multiply by 7" rule), since the first two years count for the most and larger dogs age faster.
What is the average lifespan of a Australian Shepherd?+
Australian Shepherds typically live about 10–14 years.
When is a Australian Shepherd considered a senior?+
Around 8.5 years. After that, more frequent vet checkups, joint support, and dental care become important.
Australian Shepherd age chart
Swipe the table sideways to see all columns.
| Age | Human age | Life stage |
|---|---|---|
| 3 months | About 5 | Puppy |
| 6 months | About 10 | Puppy |
| 9 months | About 14 | Young Adult |
| 1 year | About 15 | Young Adult |
| 2 years | About 24 | Adult |
| 3 years | About 29 | Adult |
| 4 years | About 34 | Adult |
| 5 years | About 39 | Adult |
| 6 years | About 44 | Adult |
| 7 years | About 49 | Adult |
| 8 years | About 54 | Adult |
| 9 years | About 59 | Senior |
| 10 years | About 64 | Senior |
| 11 years | About 69 | Senior |
| 12 years | About 74 | Senior |
| 13 years | About 79 | Senior |
| 14 years | About 84 | Senior |
| 15 years | About 89 | Senior |
| 16 years | About 94 | Senior |
| 17 years | About 99 | Senior |
| 18 years | About 104 | Senior |
| 19 years | About 109 | Senior |
| 20 years | About 114 | Senior |
This chart is a general estimate. Real aging varies with genetics, weight, health, diet, and veterinary care.