Personalize this chart
Enter age and weight to see your dog's unique trajectory.
How big will my Irish Terrier get? Predict adult weight and track your puppy's development.
Bold, dashing, and tenderhearted
Terrier
Small
13-15 years
12 months
25-27 lbs
18" tall
25-27 lbs
18" tall
We use a proprietary High-Sensitivity Dynamic Model calibrated specifically for Irish Terrier development. This accounts for the biological reality that growth velocity decelerates sharply as a puppy matures, ensuring pinpoint accuracy for both 8-week-old puppies and older teenagers.
A Irish Terrier typically reaches its full skeletal structure around 12 months. Our algorithm applies a specific maturity multiplier that adjusts the projection as your puppy approaches this target window.
Every projection is cross-referenced against the Irish Terrier breed standard (25–27 lbs). While estimates can begin at 6 weeks, data collected after the 12-week mark provides the highest statistical confidence.
Share PetCareCalc with other pet owners or save the link to track your puppy's progress as they grow.
Add our professional calculator to your own website
Attribution required
Predicting the growth of your Irish Terrier