Use this West Highland White Terrier puppy weight calculator to predict how big your puppy will get. West Highland White Terriers are a terrier breed that typically reaches full size by around 9-12 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.
Indoor/outdoor enclosure — a good fit for toy and small breeds.
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| Age | Weight |
|---|---|
| Birth | 0.3 to 1 lbs |
| 2 Months | 3 to 5 lbs |
| 3 Months | 5 to 7 lbs |
| 4 Months | 6 to 9 lbs |
| 5 Months | 8 to 11 lbs |
| 6 Months | 9 to 13 lbs |
| 7 Months | 11 to 15 lbs |
| 9 Months | 12 to 17 lbs |
| 10 Months | 14 to 19 lbs |
| 1 Year | 15 to 20 lbs |
| 1.5 Years | 15 to 20 lbs |
| 2 Years | 15 to 20 lbs |
Estimated from typical small-breed growth curves and the West Highland White Terrier'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.
Westies are prone to a skin condition sometimes called "Westie jacket disease" (a chronic, non-allergic skin thickening), along with patellar luxation and a bone disorder called craniomandibular osteopathy that affects puppies. Ear infections and allergies are also relatively common in the breed.
A quality small-breed diet; Westies with skin sensitivities sometimes benefit from a diet with limited common allergens, which is worth discussing with a vet if skin issues appear.
The harsh, wiry double coat needs regular brushing and periodic hand-stripping (rather than clipping) to maintain its texture if kept in a traditional show-style coat; many pet owners opt for a simpler clipped trim instead.
Westies are intelligent but independent, with genuine terrier stubbornness — consistent, engaging, positive-reinforcement training gets better results than repetition, and early socialization helps with the breed's tendency toward wariness of other dogs.
The West Highland White Terrier ("Westie") was developed in Scotland, bred specifically for an all-white coat so hunters could distinguish the dog from foxes and other quarry in the field — a deliberate design choice, not just an aesthetic preference. The breed shares ancestry with several other Scottish terrier breeds before being bred into a distinct white-coated line in the late 19th century.
Westies are known for a confident, feisty terrier personality in a compact, sturdy body — bred to go to ground after vermin, they retain real terrier drive and independence despite becoming primarily a companion breed today.
