Brittany Weight Chart
Expected adult weight, growth by age and a calculator for your Brittany puppy. AKC weight: males 30 to 40 lb (14 to 18 kg), females 30 to 40 lb (14 to 18 kg).
- Male, AKC
- 30 to 40 lb (14 to 18 kg)
- Female, AKC
- 30 to 40 lb (14 to 18 kg)
- Growth-chart size class
- Medium
Predict your Brittany puppy's adult weight
Enter your puppy's age and weight to see an estimate.
Not veterinary advice. PuppySizer gives estimates from published sources. It cannot examine your pet. For any health concern, ask your own veterinarian. Read the full disclaimer.
Brittany male growth chart
Show the chart as a table
| Age | Typical male (lb) | Lower end of AKC range (lb) | Upper end of AKC range (lb) |
|---|---|---|---|
| 12 weeks | 7.4 | 9.7 | 9.1 |
| 16 weeks | 11.3 | 13.5 | 13.9 |
| 20 weeks | 15.7 | 16.9 | 19.0 |
| 26 weeks | 21.5 | 20.8 | 25.7 |
| 40 weeks | 29.0 | 25.5 | 34.2 |
| 52 weeks | 31.3 | 27.1 | 36.6 |
| 78 weeks | 33.5 | 28.7 | 38.7 |
| 104 weeks | 35.0 | 30.0 | 40.0 |
The curve ends at 35 lb (15.9 kg), the middle of the AKC range. On this curve a male reaches half of adult weight at about 22 weeks (5 months), 90 % at about 54 weeks (12 months) and 95 % at about 75 weeks (17 months).
Brittany female growth chart
Show the chart as a table
| Age | Typical female (lb) | Lower end of AKC range (lb) | Upper end of AKC range (lb) |
|---|---|---|---|
| 12 weeks | 9.4 | 11.1 | 11.4 |
| 16 weeks | 13.6 | 14.8 | 16.4 |
| 20 weeks | 18.0 | 17.8 | 21.5 |
| 26 weeks | 23.3 | 21.1 | 27.5 |
| 40 weeks | 29.7 | 25.3 | 34.7 |
| 52 weeks | 31.8 | 27.0 | 37.0 |
| 78 weeks | 33.8 | 28.9 | 38.9 |
| 104 weeks | 35.0 | 30.0 | 40.0 |
The curve ends at 35 lb (15.9 kg), the middle of the AKC range. On this curve a female reaches half of adult weight at about 20 weeks (5 months), 90 % at about 50 weeks (11 months) and 95 % at about 69 weeks (16 months).
Brittany weight by age
| Age | Male | Female |
|---|---|---|
| 12 weeks (3 mo) | 7.4 lb / 3.3 kg | 9.4 lb / 4.2 kg |
| 16 weeks (4 mo) | 11.3 lb / 5.1 kg | 13.6 lb / 6.2 kg |
| 20 weeks (5 mo) | 15.7 lb / 7.1 kg | 18.0 lb / 8.2 kg |
| 26 weeks (6 mo) | 22 lb / 9.8 kg | 23 lb / 10.6 kg |
| 40 weeks (9 mo) | 29 lb / 13.2 kg | 30 lb / 13.5 kg |
| 52 weeks (12 mo) | 31 lb / 14.2 kg | 32 lb / 14.4 kg |
| 78 weeks (18 mo) | 33 lb / 15.2 kg | 34 lb / 15.3 kg |
| 104 weeks (24 mo) | 35 lb / 15.9 kg | 35 lb / 15.9 kg |
Typical healthy dog, from the shape of the Salt et al. (2017) chart for the medium size class, scaled to the AKC weight. Healthy puppies vary around these values.
Brittany size questions
How big does a Brittany get?
The American Kennel Club gives 30 to 40 lb (14 to 18 kg) for males and 30 to 40 lb (14 to 18 kg) for females. Individual dogs can fall outside a breed range, and a mix or a dog from working lines may be larger or smaller.
When is a Brittany fully grown?
On this curve a male reaches half of adult weight at about 22 weeks (5 months), 90 % at about 54 weeks (12 months) and 95 % at about 75 weeks (17 months). On this curve a female reaches half of adult weight at about 20 weeks (5 months), 90 % at about 50 weeks (11 months) and 95 % at about 69 weeks (16 months). These ages come from the shape of the published growth chart for medium dogs, scaled to the AKC weight, so they describe a typical dog, not a particular one.
How much should a Brittany puppy weigh at 6 months?
A typical male is about 22 lb (9.8 kg) and a female is about 23 lb (10.6 kg) at 26 weeks on this curve. The range for healthy puppies is wide, so use the calculator above with your own puppy’s weight.
Other breeds in the same size class
- Standard Poodle60 to 70 lb (27 to 32 kg)
- Bulldog50 lb (23 kg)
- German Shorthaired Pointer55 to 70 lb (25 to 32 kg)
- Australian Shepherd50 to 65 lb (23 to 29 kg)
- Siberian Husky45 to 60 lb (20 to 27 kg)
- Border Collie30 to 55 lb (14 to 25 kg)
- Vizsla55 to 60 lb (25 to 27 kg)
- English Springer Spaniel50 lb (23 kg)
Sources
- AKC breed pages (weight line only). American Kennel Club. Read 2026-11-08. Used for: Breed weight ranges, as numbers only. No AKC text is reproduced.
- Growth standard charts for monitoring bodyweight in dogs of different sizes. Salt C, Morris PJ, Wilson D, Lund EM, German AJ. PLoS ONE 12(9): e0182064 (CC BY 4.0). Read 2026-11-08. Used for: Centile growth curves for five size classes (adult weight under 40 kg) from 12 weeks to 2 years, built from Banfield Pet Hospital records. We read the values off the published charts.
AKC weight read on 2026-11-08 from akc.org/dog-breeds/brittany (numbers only). Facts last checked November 8, 2026.