All Breeds › Australian Shepherd
Predict your Australian Shepherd's adult weight using veterinary growth data
| Male Adult Weight | 50–65 lbs |
| Female Adult Weight | 40–55 lbs |
| Male Height | 20–23 inches |
| Female Height | 18–21 inches |
| Life Expectancy | 12–15 years |
| Size Category | large |
| AKC Group | Herding |
| Full Grown By | ~15 months (65 weeks) |
Enter your puppy's age and current weight for a personalized prediction.
Open CalculatorExpected weight at key ages based on veterinary growth data for large-sized breeds.
| Age | % Adult Weight | Male Est. | Female Est. |
|---|---|---|---|
| 8 weeks | 16% | ~9 lbs | ~8 lbs |
| 4 months | 41% | ~24 lbs | ~21 lbs |
| 6 months | 66% | ~38 lbs | ~32 lbs |
| 8 months | 88% | ~51 lbs | ~42 lbs |
| 12 months | 96% | ~56 lbs | ~46 lbs |
| 15 months | 100% | ~58 lbs | ~48 lbs |
| Adult | 100% | 50–65 lbs | 40–55 lbs |
Most Australian Shepherds reach their adult weight by around 15 months (65 weeks).
As a large-sized breed, your Australian Shepherd reaches adult size by 14-18 months. Larger breeds have a longer growth phase. Feeding a large-breed-specific puppy food during this period supports proper bone and joint development.
Individual dogs may reach full size slightly earlier or later. Spayed or neutered puppies may also have slightly different growth timelines. Regular vet checkups are the best way to track your Australian Shepherd's progress.
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Because Australian Shepherds are a large-sized breed, look for a large breed puppy formula designed for their growth needs. Controlled calcium and phosphorus for joint health.
Feed puppy-specific food until your Australian Shepherd reaches adult size (around 15 months), then transition to an adult formula over 7–10 days.
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For a large-sized breed like the Australian Shepherd, a 42-inch crate (fits dogs up to ~90 lbs) is the right adult size. Buy the adult size from the start and use the included divider panel while your puppy is still growing.