West Highland White Terrier Puppy Weight Calculator

Calculate the adult weight for your West Highland White Terrier. Just type your puppy’s current weight and age, and see how big your puppy gets.

West Highland White Terrier Breed Profile and Growth Guide

Breed Overview

The West Highland White Terrier, affectionately known as the Westie, is a small but sturdy terrier originating from Scotland. Bred in the 19th century to hunt vermin such as rats, foxes, and badgers, the Westie is distinguished by its bright white coat, sharp expression, and confident personality.

Westies are spirited, affectionate, and adaptable dogs. They are known for their cheerful nature and often form close bonds with their families, making them excellent companions. While they are small, they retain the tenacity of terriers, so early training and consistent boundaries help bring out their best qualities.

Size category: Small
Westies are classified as a small breed, typically weighing between 15–20 lbs as adults. Because of their compact size, tracking growth is important to ensure healthy development and to avoid issues such as underfeeding, overfeeding, or obesity, which can be especially problematic in small breeds.

West Highland White Terrier Growth Chart & Weight Ranges

Here is an overview of average weight ranges for Westie puppies by age:

Age	Male Weight Range (lbs)	Female Weight Range (lbs)
4 weeks	2 – 3	1.5 – 2.5
8 weeks	4 – 5.5	3.5 – 5
3 months	6 – 8	5 – 7
4 months	7 – 9.5	6 – 8.5
6 months	9 – 12	8 – 11
9 months	11 – 14	10 – 13
12 months	13 – 16	12 – 15
Adult (12–14 months)	15 – 20	13 – 18

Note: Males typically weigh 2–4 lbs more than females at full maturity.

How Much Bigger Will My West Highland White Terrier Puppy Get?

Westie puppies grow quickly in the first 6 months and usually reach their full adult height by around 8–9 months. However, they may continue filling out and adding a bit of weight until about 12–14 months.

• 50% of adult weight is usually reached by 3–4 months.
• 75% is reached by 6 months.
• By their first birthday, most Westies are close to their final weight and size.

Rule of Thumb:
You can estimate your Westie’s adult weight by doubling their weight at 16 weeks.

Exception:
Unlike giant breeds, Westies mature relatively quickly, so growth is mostly complete by 12–14 months.

For more detailed breed information, visit the American Kennel Club West Highland White Terrier profile or the West Highland White Terrier Club of America.

West Highland White Terrier Growth Tips

Nutrition

• Feed a high-quality small-breed puppy food that supports rapid but balanced growth.
• Puppies should eat 3–4 small meals daily until about 6 months, then transition to 2 meals per day.
• Be mindful of treats, as Westies are prone to obesity if overfed.

Exercise

• Westie puppies are energetic but small, so short walks, play sessions, and gentle training are best.
• Avoid excessive jumping or rough play on hard surfaces while their bones are still developing.
• Mental stimulation is important—puzzle toys and basic obedience training keep them sharp.

Health Watch

• Westies are generally healthy but can be prone to allergies and skin conditions, which may emerge during growth.
• Dental issues are common in small breeds—regular brushing is recommended.
• Keep weight within the healthy range to avoid strain on joints and to maintain overall health.