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Mini Aussie growth chart
How much should a Mini Aussie puppy weigh? Find the row that matches your puppy's sex and expected adult weight, and read across by age.
Mini Aussie puppy weight chart (lb)
| Adult weight | 2 mo | 3 mo | 4 mo | 5 mo | 6 mo | 8 mo | 10 mo | 12 mo |
|---|---|---|---|---|---|---|---|---|
| Adult, 20 lb | 3.8 | 6.7 | 9.4 | 12 | 14 | 17 | 18 | 19 |
| Adult, 40 lb | 7.7 | 13 | 19 | 24 | 28 | 33 | 37 | 39 |
Mini Aussie puppy weight chart (kg)
| Adult weight | 2 mo | 3 mo | 4 mo | 5 mo | 6 mo | 8 mo | 10 mo | 12 mo |
|---|---|---|---|---|---|---|---|---|
| Adult, 9.1 kg | 1.7 | 3.0 | 4.3 | 5.4 | 6.4 | 7.6 | 8.4 | 8.8 |
| Adult, 18 kg | 3.5 | 6.0 | 8.5 | 11 | 13 | 15 | 17 | 18 |
Typical weights by month. Individual puppies often sit 10–15% above or below these numbers. Last reviewed October 7, 2026.
The AKC registers the Mini Aussie as the Miniature American Shepherd. For the full-size breed see the Australian Shepherd growth chart.
How big does a Mini Aussie get?
According to the American Kennel Club's breed profile for the Miniature American Shepherd, adults weigh: male & female 20–40 lb. Life expectancy is 12–13 years.
| Weight | Height | |
|---|---|---|
| Male & female | 20–40 lb | 14–18 in (males), 13–17 in (females) |
When does a Mini Aussie stop growing?
Mini Aussies grow like other medium-sized dogs: they are close to adult weight at around 13 months. At 6 months a typical Mini Aussie puppy has reached about 70% of its adult weight.
To estimate your own puppy's adult weight from its current weight and age, use the puppy weight calculator and choose "Medium" as the expected adult size.
How the chart is made
The adult weights come from the AKC breed profile. The weight at each month is estimated with our medium-breed growth curve, which gives the share of adult weight a typical puppy of that size reaches at each age. The curves are simplified from published research on dog growth, including the growth standard charts by Salt and colleagues (PLOS ONE, 2017).
If your puppy is well below or above the chart, stops gaining weight, or looks very thin or round, ask your vet to check its body condition.
Questions people ask
How much should a 3-month-old Mini Aussie weigh?
Typically about 6.7–13 lb, depending on sex and how big the dog will be as an adult.
How much should a 6-month-old Mini Aussie weigh?
Typically about 14–28 lb, roughly 70% of adult weight.
When is a Mini Aussie full grown?
Most Mini Aussies are close to their adult weight at around 13 months, though many keep filling out with muscle for a while after that.
How big will my Mini Aussie get?
The AKC lists adult weights of male & female 20–40 lb. Your puppy's parents are a good guide to where in that range it will end up.