Norwich Terrier Puppy Weight Calculator

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

Norwich Terrier Breed Profile & Growth Guide

Breed Overview

The Norwich Terrier is a charming and spirited small breed originating from England, bred primarily to hunt rats and other small vermin. As one of the smallest working terriers, the Norwich Terrier is known for its fearless nature, alert expression, and affectionate personality. Despite their compact size, these dogs are bold, intelligent, and full of energy, making them ideal companions for active individuals or families.

They are closely related to the Norfolk Terrier but are distinguished by their upright ears. Norwich Terriers are outgoing and friendly with people and other dogs, though they retain a strong prey drive and may chase smaller animals.

Size Category: Small
Weighing between 10 and 12 pounds fully grown, the Norwich Terrier is a small breed. Because small breeds mature quickly and are prone to obesity if overfed, tracking their growth is essential to ensure healthy development and to prevent joint stress and other issues tied to rapid or improper growth.

Norwich Terrier Growth Chart & Weight Ranges

Age	Male Weight (lbs)	Female Weight (lbs)
4 weeks	1.0 – 1.5	0.9 – 1.4
8 weeks	2.0 – 3.0	1.8 – 2.8
12 weeks	3.5 – 4.5	3.0 – 4.0
4 months	4.5 – 5.5	4.0 – 5.0
6 months	6.0 – 7.5	5.5 – 7.0
9 months	8.0 – 9.5	7.0 – 9.0
12 months	10 – 12	9 – 11

Gender Differences:
Males typically weigh 1–2 pounds more than females and may appear slightly stockier or more muscular.

How Much Bigger Will My Norwich Terrier Puppy Get?

Norwich Terrier puppies grow rapidly during their first six months and typically reach 50% of their adult weight by 3 to 4 months of age. Most will reach their full adult height by 6–8 months, though they may continue to fill out slightly until about 12 months.

Rule of Thumb:
To estimate adult size, double your puppy’s weight at 16 weeks.

Note:
Unlike giant breeds, Norwich Terriers complete most of their growth in the first year and rarely grow beyond 12 months.

You can read more about the breed’s care on the American Kennel Club Norwich Terrier profile or through the Norwich Terrier Club of America.

Norwich Terrier Growth Tips

Nutrition

• Feed a small breed puppy food that is high in calories and protein to support fast early growth.
• Use a 3-meal-per-day schedule until around 6 months, then transition to 2 meals per day.
• Monitor weight closely to prevent obesity, a common issue in small dogs that can strain joints and affect overall health.

Exercise

• Norwich Terriers are energetic but don’t require intense workouts. Instead, provide short, frequent walks and plenty of indoor playtime.
• Avoid excessive jumping or stair climbing in young puppies to protect their developing joints.
• Include early socialization and training sessions to build confidence and mental stimulation.

Health Watch

While generally healthy, the Norwich Terrier may be prone to:

• Patellar luxation—common in small breeds; maintain a healthy weight to reduce joint stress.
• Hip dysplasia—although less common, it can occur and should be monitored.
• Tracheal collapse—use a harness instead of a collar during walks.