Wondering how big your Harrier puppy will get? Use the calculator below: enter your puppy’s age and current weight to see a personalized growth curve and an adult weight estimate.
Estimates combine your puppy’s current trajectory with typical growth curves for this breed and size class. Individual dogs vary — nutrition, genetics and neuter timing all matter. For health concerns, ask your vet.
The Harrier is a medium-sized breed. Adult males typically weigh 45–60 lb (20.4–27.2 kg) and females 45–60 lb (20.4–27.2 kg). Most Harriers reach about half their adult weight around 4.3 months, hit 90% by roughly 9.1 months, and are fully grown near 13 months. A useful rule of thumb for medium breeds: they roughly double their four-month weight.
When do Harriers stop growing?
Most Harriers reach their full adult height and weight by about 13 months. Growth is fastest before 4.3 months, then slows steadily — by 9.1 months your puppy will be about 90% of its final size.
How much should a Harrier puppy weigh at 4 months?
A typical 4-month-old Harrier weighs roughly 21–28 lb, about 46% of its adult weight. Use the calculator above with your puppy’s exact weight for a personalized estimate — individual dogs vary.