Use this Great Pyrenees puppy weight calculator to predict how big your puppy will get. Great Pyrenees are a giant working breed that keeps growing until around 18-24 months.
Enter your puppy's current weight and age to predict their adult size
Estimates based on breed growth curves. Individual dogs vary with genetics and nutrition — check with your vet for a personalized read.
Slows fast eaters, can aid digestion, holds 4 cups dry or wet food — sized for giant breeds.
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| Age | Weight |
|---|---|
| Birth | 2 to 4 lbs |
| 2 Months | 7 to 10 lbs |
| 3 Months | 13 to 20 lbs |
| 4 Months | 21 to 30 lbs |
| 5 Months | 30 to 40 lbs |
| 6 Months | 38 to 50 lbs |
| 7 Months | 47 to 60 lbs |
| 9 Months | 55 to 70 lbs |
| 10 Months | 64 to 80 lbs |
| 1 Year | 72 to 90 lbs |
| 1.5 Years | 81 to 100 lbs |
| 2 Years | 85 to 100 lbs |
Estimated from typical giant-breed growth curves and the Great Pyrenees's adult weight range. Individual puppies vary — use the calculator above for a prediction based on your puppy's actual current weight.
New breed data, growth tips, and puppy-parenting insights, plus our free printable puppy growth tracker.
As a giant, deep-chested breed, Great Pyrenees carry real bloat (GDV) risk — smaller, multiple daily meals and avoiding vigorous exercise around mealtimes both help. They're also predisposed to osteosarcoma (bone cancer), a serious concern in giant breeds worth watching for via any unexplained limping, along with hip dysplasia and patellar luxation.
A large-breed puppy formula through the slow growth period (Pyrenees don't fully fill out until 3-4 years old), and portion-controlled adult feeding split into 2-4 smaller meals to help reduce bloat risk.
The thick double coat sheds heavily year-round with an especially heavy seasonal blowout; regular brushing several times a week keeps it manageable.
Great Pyrenees are independent by design and don't excel at competitive obedience the way more biddable breeds do — patient, consistent training works better than repetition. This is a breed best suited to experienced owners with space, given both its size and its independent streak.
The Great Pyrenees descends from ancient livestock guardian dogs that migrated westward from Asia Minor into the Pyrenees Mountains between France and Spain, where for centuries they worked largely unsupervised, guarding flocks against wolves and bears without human direction. French nobility adopted the breed by the 17th century — King Louis XIV declared it the Royal Dog of France. The AKC recognized the breed in 1933.
That history of independent, unsupervised guarding work shaped a breed that's calm and gentle with family but genuinely independent-minded — bred to make its own decisions in the field, which shows up as a strong-willed streak in companion settings.
