Irish Terrier puppy weight calculator

Irish Terrier adults usually weigh about 25 to 27 lb and are close to full size by about 12 months. A typical 12-week-old Irish Terrier weighs about 7.5 to 8 lb.

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Adult weight: about 25 to 27 lb (medium)

8 to 52 weeks

In pounds

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Irish Terrier adults usually weigh

about 25 to 27 lb

At 12 weeks, Irish Terrier puppies are typically about 30% of their adult weight, with most of their growing still ahead.

Typical puppy growth curveTypical weight from 8 weeks to 65 weeks, rising to 25 to 27 pounds as an adult. Your puppy: 8 pounds at 12 weeks.010203081626395265Age in weeksWeight (lb)
Typical range Your puppy today

Estimates vary, and every puppy grows at their own pace. Ask your vet about your puppy’s growth.

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Typical Irish Terrier weight by age

AgeTypical weight
8 weeks5 lb
12 weeks7.5 to 8 lb
16 weeks10 to 11 lb
5 months14 to 15 lb
6 months16 to 17 lb
9 months21 to 23 lb
12 months24 to 26 lb
18 months25 to 27 lb

Puppies sit above and below these figures, and every puppy grows at their own pace. Ask your vet about your puppy’s growth.

Irish Terrier questions

How big will my Irish Terrier get?

Most Irish Terrier adults weigh about 25 to 27 lb. Individual dogs vary, and the parents' size is often a helpful guide.

When do Irish Terrier puppies stop growing?

Irish Terrier puppies are usually close to adult weight by about 12 months. At 6 months a typical Irish Terrier weighs about 16 to 17 lb, around 63% of adult weight.

How much does a 12-week-old Irish Terrier weigh?

Typically about 7.5 to 8 lb, and by 16 weeks about 10 to 11 lb. Puppies sit above and below these figures, and every puppy grows at their own pace. If you have questions about your puppy's growth, ask your vet.

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