Calculate the adult weight for your St. Bernard. Just type your puppy’s current weight and age, and see how big your puppy gets.
Weight Predictions
Predicted Adult Weight
Based on current weight and age progression
AKC Breed Standard
Official AKC weight range for this breed
Breed Average
Average weight for this breed and gender
Growth Timeline
Important Notes
- These predictions are estimates based on breed standards and growth patterns
- Individual dogs may vary significantly from these predictions
- Factors like nutrition, health, and genetics affect final adult weight
- Consult your veterinarian for personalized growth assessments
St. Bernard Breed Overview
The St. Bernard is a gentle giant originating from the Swiss and Italian Alps, famously bred by monks at the Great St. Bernard Hospice to rescue travelers lost in snow and avalanches. Known for their calm, affectionate, and patient nature, these dogs are exceptionally loyal family companions, especially good with children. Despite their size, they are typically easy-going and thrive on human companionship.
As a giant breed, adult males often weigh 140–180 lbs and females 120–140 lbs. Because of their rapid early growth and extended development period, growth tracking is crucial to ensure healthy bone and joint development. Improper nutrition or excessive weight during growth can increase the risk of orthopedic conditions such as hip and elbow dysplasia (American Kennel Club).
St. Bernard Growth Chart & Weight Ranges
| Age | Average Weight (Male) | Average Weight (Female) |
|---|---|---|
| 4 weeks | 12–18 lbs (5.4–8.2 kg) | 10–16 lbs (4.5–7.3 kg) |
| 8 weeks | 22–36 lbs (10–16.3 kg) | 18–30 lbs (8.2–13.6 kg) |
| 3 months | 48–65 lbs (21.8–29.5 kg) | 42–55 lbs (19.1–24.9 kg) |
| 6 months | 85–110 lbs (38.6–49.9 kg) | 75–95 lbs (34–43.1 kg) |
| 9 months | 110–140 lbs (49.9–63.5 kg) | 95–120 lbs (43.1–54.4 kg) |
| 12 months | 130–165 lbs (59–74.8 kg) | 105–135 lbs (47.6–61.2 kg) |
| 18–24 months | 140–180 lbs (63.5–81.6 kg) | 120–140 lbs (54.4–63.5 kg) |
Note: Males typically weigh 15–20 lbs more than females when fully grown.
How Much Bigger Will My St. Bernard Puppy Get?
Most St. Bernard puppies reach 50% of their adult weight by 6–7 months. They grow rapidly during the first year but continue filling out until 18–24 months, as giant breeds have slower skeletal maturation.
Note: A useful guideline is to double their weight at 16 weeks for a rough estimate of adult size. However, keep in mind that their massive frame and muscle mass will continue to develop well into their second year.
St. Bernard Growth Tips
Nutrition
- Feed a giant-breed puppy formula to promote slow, steady growth and prevent excessive strain on developing joints.
- Provide 3–4 smaller meals daily until 6 months old, then transition to 2 meals per day.
- Avoid overfeeding—extra weight increases the risk of hip and elbow dysplasia.
Exercise
- Gentle walks and controlled play are best during puppyhood.
- Avoid excessive running, jumping, or stair climbing before 18 months to protect developing joints.
- Swimming is an excellent low-impact exercise option.
Health Watch
- Monitor for hip and elbow dysplasia, common in giant breeds.
- Watch for signs of bloat (gastric torsion)—feed smaller meals and avoid vigorous exercise immediately after eating.
- Regular vet visits are essential for monitoring growth patterns and adjusting nutrition as needed (Saint Bernard Club of America).
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