Irish Wolfhound Weight Chart by Age

An adult male Irish Wolfhound weighs at least 120 lb (54.4 kg) and an adult female at least 105 lb (47.6 kg), according to the American Kennel Club breed standard.

At 3 months a typical male weighs 34.9 lb (15.8 kg) and a typical female 33.1 lb (15.0 kg). Half of males weigh 25.5–45.6 lb (11.6–20.7 kg), and half of females 24.0–43.7 lb (10.9–19.8 kg). A typical puppy is around 26% of its adult weight at this age.

At 4 months a typical male weighs 53.3 lb (24.2 kg) and a typical female 49.7 lb (22.5 kg). Half of males weigh 40.5–68.1 lb (18.4–30.9 kg), and half of females 37.2–64.0 lb (16.9–29.0 kg). A typical puppy is about 40% of the way to adult weight.

At 6 months a typical male weighs 86.0 lb (39.0 kg) and a typical female 77.6 lb (35.2 kg). Half of males weigh 66.4–108.2 lb (30.1–49.1 kg), and half of females 59.5–98.7 lb (27.0–44.8 kg).

At 12 months a typical male weighs 124.1 lb (56.3 kg) and a typical female 109.8 lb (49.8 kg). Half of males weigh 96.4–152.9 lb (43.7–69.4 kg), and half of females 85.3–137.8 lb (38.7–62.5 kg). That is about 92% of final weight, with the rest filling in over the following months.

Dogs of this size that were weighed both as puppies and as adults ended up at about 2.5 times their 4-month weight, in records from US veterinary clinics. The calculator on the home page uses those records for the puppy’s own age and weight, and returns a range rather than one number.

Height is usually settled first; weight keeps filling in for longer. On the growth curve for its size, an Irish Wolfhound stays above 95% of adult weight from about 14 months, and the last 8% after its first birthday comes on slowly.

Yes. The standard’s minimums are 120 lb for males and 105 lb for females, and measured UK Wolfhounds show a similar gap: a median of 68.0 kg for males and 61.0 kg for females (O’Neill et al. 2026). Use the chart for your dog’s sex.

A giant breed, defined by adult weight. That classification determines the growth curve used here: veterinary research shows dogs of similar adult size grow at similar rates regardless of breed.

Not necessarily: 1 in 10 healthy puppies weighs less than the lightest figure in the table. What matters more is the trend. A puppy that drifts from one part of the range to a lower one is worth checking: look at its body condition and ask your vet about its diet. A single low reading is not a diagnosis.

Body condition tells you more than the scale. You should be able to feel the ribs under a thin layer of fat without pressing, see a waist from above, and see the belly tuck up from the side. A dog can sit inside the weight range and still carry too much fat.

Most published charts come from one breeder’s litters or from unsourced rules of thumb, and many do not say whether the figures are for males, females or both. The ranges here come from centile curves fitted to millions of veterinary bodyweight records, scaled to the AKC adult range, and split by sex.

The research behind these curves found neutering shifted growth trajectory only slightly, by less than the variation between individual dogs, so separate curves were not needed. Neutering is associated with a higher chance of becoming overweight in adulthood, which is a body condition question rather than a growth chart one.

An adult Irish Wolfhound weighs at least 54.4 kg for males and at least 47.6 kg for females under the American Kennel Club standard. A typical male weighs 15.8 kg at 3 months, 39.0 kg at 6 months and 56.3 kg at 12 months; a typical female 15.0 kg, 35.2 kg and 49.8 kg. The charts above give every month in kilograms, with a switch to pounds.

The American Kennel Club standard gives females at least 105 lb (47.6 kg). A typical female Irish Wolfhound weighs 49.7 lb at 4 months, 77.6 lb at 6 months and 109.8 lb at 12 months. Weight stays above 95% of the adult figure from about 14 months. The female chart above gives every month.

The American Kennel Club standard gives males at least 120 lb (54.4 kg). A typical male Irish Wolfhound weighs 53.3 lb at 4 months, 86.0 lb at 6 months and 124.1 lb at 12 months. Weight stays above 95% of the adult figure from about 14 months. The male chart above gives every month.