English Cocker Spaniel Weight Chart by Age

An adult male English Cocker Spaniel weighs 28.0–34.0 lb (12.7–15.4 kg) and an adult female 26.0–32.0 lb (11.8–14.5 kg), according to the American Kennel Club breed standard.

At 3 months a typical male weighs 11.8 lb (5.4 kg) and a typical female 10.9 lb (4.9 kg). Half of males weigh 9.0–15.1 lb (4.1–6.9 kg), and half of females 8.7–13.4 lb (3.9–6.1 kg). A typical puppy is around 35% of its adult weight at this age.

At 4 months a typical male weighs 16.8 lb (7.6 kg) and a typical female 15.1 lb (6.9 kg). Half of males weigh 13.2–21.0 lb (6.0–9.5 kg), and half of females 12.4–18.2 lb (5.6–8.2 kg). A typical puppy is about 51% of the way to adult weight.

At 6 months a typical male weighs 24.3 lb (11.0 kg) and a typical female 21.2 lb (9.6 kg). Half of males weigh 19.3–30.1 lb (8.8–13.6 kg), and half of females 17.9–25.2 lb (8.1–11.4 kg).

At 12 months a typical male weighs 30.6 lb (13.9 kg) and a typical female 26.9 lb (12.2 kg). Half of males weigh 24.3–38.0 lb (11.0–17.2 kg), and half of females 22.5–32.2 lb (10.2–14.6 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 2.1 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 English Cocker Spaniel 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 most desirable weights are 28 to 34 lb for males and 26 to 32 lb for females, so the male chart sits 2 lb higher at both ends. In UK veterinary records the gap was a little wider: a median of 16.1 kg for males and 13.8 kg for females (Engdahl et al. 2023).

A medium 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 English Cocker Spaniel weighs 12.7–15.4 kg for males and 11.8–14.5 kg for females under the American Kennel Club standard. A typical male weighs 5.4 kg at 3 months, 11.0 kg at 6 months and 13.9 kg at 12 months; a typical female 4.9 kg, 9.6 kg and 12.2 kg. The charts above give every month in kilograms, with a switch to pounds.

The American Kennel Club standard gives females 26.0–32.0 lb (11.8–14.5 kg). A typical female English Cocker Spaniel weighs 15.1 lb at 4 months, 21.2 lb at 6 months and 26.9 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 28.0–34.0 lb (12.7–15.4 kg). A typical male English Cocker Spaniel weighs 16.8 lb at 4 months, 24.3 lb at 6 months and 30.6 lb at 12 months. Weight stays above 95% of the adult figure from about 14 months. The male chart above gives every month.