How Big Will My Australian Shepherd Get?
Australian Shepherds are a medium breed that typically weigh 18–29 kg (40–64 lbs) at full size. Medium breeds usually reach their adult weight around 12–14 months.
Australian Shepherd Size at a Glance
Adult Weight
18–29 kg
40–64 lbs
Adult Height
46–58 cm
18–23 in
Size Category
medium
Fully Grown By
12–14 mo
Australian Shepherd Growth Chart
Australian Shepherd Weight by Age
Predict Your Australian Shepherd Puppy's Adult Weight
Enter your puppy's current age and weight for a personalized prediction.
Open Weight CalculatorAustralian Shepherd Growth & Development
Medium breeds usually reach their adult weight around 12–14 months. They have a steady growth curve with most growth happening in the first 6 months.
A Australian Shepherd's growth rate is fastest in the first 6 months of life. During this period, proper nutrition and regular vet checkups ensure your puppy stays on a healthy growth trajectory.
Factors that influence your Australian Shepherd's adult size include genetics (parent size), nutrition quality, spay/neuter timing, and overall health. Males typically weigh 10–20% more than females.
Frequently Asked Questions
How big will my Australian Shepherd puppy get?
A full-grown Australian Shepherd typically weighs between 18–29 kg (40–64 lbs). Males tend to be on the larger end of the range while females are usually smaller.
When do Australian Shepherds stop growing?
Medium breeds usually reach their adult weight around 12–14 months. They have a steady growth curve with most growth happening in the first 6 months. Individual dogs may reach their full size slightly earlier or later depending on genetics, diet, and overall health.
How much should a Australian Shepherd puppy weigh at 12 weeks?
At 12 weeks, a Australian Shepherd puppy typically weighs around 7.1–9.4 kg (16–21 lbs), which is roughly 30–40% of their adult weight.
How can I tell if my Australian Shepherd puppy is the right weight?
Compare your puppy's weight to the growth chart above. A healthy Australian Shepherd puppy should follow a steady growth curve. If your puppy's weight deviates significantly from the expected range, consult your veterinarian.
Learn More About Australian Shepherds
Explore the full breed profile, find name ideas, or check ownership costs.