Cocker Spaniel weight chart by age
In a published growth study, adult Cocker Spaniel dogs averaged about 22 lb (10.2 kg). Puppies reached 99 percent of that weight at around 47 weeks, which is about 11 months. Use the chart to see what is typical at each age, or enter your puppy's weight for an estimate of the adult size.
Your puppy is at about 48% of its adult weight.
Cocker Spaniel puppy weight by age
| Age | Pounds | Kilograms | Of adult weight |
|---|---|---|---|
| 8 weeks | 4.8 | 2.2 | 21% |
| 12 weeks | 7.4 | 3.4 | 33% |
| 16 weeks | 10.7 | 4.9 | 48% |
| 20 weeks | 14.1 | 6.4 | 63% |
| 24 weeks | 17.0 | 7.7 | 76% |
| 32 weeks | 20.5 | 9.3 | 91% |
| 40 weeks | 21.9 | 9.9 | 97% |
| 1 year | 22.4 | 10.2 | 100% |
| 15 months | 22.5 | 10.2 | 100% |
| 18 months | 22.5 | 10.2 | 100% |
| Adult average | 22.5 | 10.2 | 100% |
Values are calculated from the growth curve fitted to the Cocker Spaniel puppies in the study. Males and females were not reported separately here, and individual dogs vary, so treat the numbers as a typical pattern, not a standard.
Cocker Spaniel growth chart
The dot marks one year. After that, weight changes slowly.
How fast does a Cocker Spaniel grow?
This breed is in the small group in our puppy size calculator. Growth was half done at about 17 weeks, which is when the curve is steepest. A Cocker Spaniel is usually close to its adult weight by 11 months, although the body can keep filling out afterward. For how much to feed along the way, see the puppy feeding chart.
Questions
How much should a Cocker Spaniel puppy weigh at 8 weeks?
In the study a Cocker Spaniel weighed about 4.8 lb (2.2 kg) at 8 weeks.
How much should a Cocker Spaniel puppy weigh at 16 weeks?
About 10.7 lb (4.9 kg), which is roughly 48 percent of the adult weight.
How much does an adult Cocker Spaniel weigh?
The adult dogs in the study averaged about 22 lb (10.2 kg). Breed standards and individual dogs differ.
When is a Cocker Spaniel fully grown?
Around 47 weeks (11 months) for weight, according to the growth curve.
Is my Cocker Spaniel overweight?
Weight alone cannot say. Use the body condition check to look at ribs and waist.
Other breeds
Papillon, Miniature Schnauzer, Cairn Terrier, Beagle, English Springer Spaniel, Labrador Retriever, English Mastiff, St. Bernard, Irish Wolfhound, Great Dane, Newfoundland. See also the dog weight chart for all breeds side by side.
Sources
- Hawthorne A.J. et al., "Body-weight changes during growth in puppies of different breeds", Journal of Nutrition, 2004.
Last reviewed 2026-10-26. This page is general information and not veterinary advice.