Welsh Terrier Puppy Weight Calculator

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

Welsh Terrier Breed Profile

Breed Overview

The Welsh Terrier is a spirited and intelligent breed that originated in Wales, where it was traditionally bred to hunt foxes, badgers, and otters. With its wiry black-and-tan coat and confident personality, the Welsh Terrier is often described as a smaller cousin of the Airedale Terrier.

These dogs are lively, affectionate, and playful, making them excellent family companions while still maintaining the courage and determination of a true terrier. They thrive in homes that provide both mental stimulation and physical activity.

Size Category and Why Growth Tracking Matters

The Welsh Terrier is considered a small to medium breed, with adult males and females typically weighing 18–22 lbs. Because of their compact, athletic build, growth tracking is important to ensure puppies develop lean muscle without becoming overweight. Excess weight can put strain on their joints and reduce agility, while undernourishment can hinder healthy bone and muscle development.

Welsh Terrier Growth Chart & Weight Ranges

Below is a general guide to track Welsh Terrier growth. Individual puppies may grow slightly faster or slower depending on genetics, nutrition, and activity.

Age	Average Weight (lbs)
4 weeks	2 – 3
8 weeks	4 – 6
3 months	6 – 8
4 months	8 – 10
6 months	10 – 14
9 months	13 – 17
12 months	16 – 20
15–18 months	18 – 22 (adult)

Note: Male Welsh Terriers may weigh 1–2 lbs more than females, but the difference is subtle compared to larger breeds.

How Much Bigger Will My Welsh Terrier Puppy Get?

• Welsh Terrier puppies usually reach 50% of their adult weight by 4–5 months.
• By 6 months, they are around 70–80% of adult size.
• Most reach their full adult weight between 12 and 15 months.

Rule of thumb: To estimate adult size, double your puppy’s weight at 16 weeks. For example, an 8 lb puppy at 4 months will likely weigh around 16 lbs as an adult.

For additional reference, see the American Kennel Club breed profile.

Welsh Terrier Growth Tips

Nutrition

• Feed a small-breed puppy formula to support higher metabolism.
• Suggested feeding schedule:
  • 8–12 weeks: 3–4 small meals per day
  • 3–6 months: 3 meals daily
  • 6–12 months: 2 meals daily
• Transition to adult small-breed food around 12 months. Avoid free-feeding, as terriers can gain weight quickly if not monitored.

Exercise

Welsh Terriers are energetic and playful.

• Provide daily walks, interactive games, and puzzle toys.
• Allow safe off-leash play in a secure yard.
• Avoid long-distance running or repetitive jumping during the first year, as their joints are still developing.

Health Watch

While generally healthy, some growth-related concerns to monitor include:

• Hip dysplasia – though less common than in large breeds, it can occur.
• Obesity – this breed loves food, so portion control is key.
• Dental health – like many small/medium breeds, they may be prone to tartar buildup, so regular dental care is recommended.