German Spaniel Weight & Size
How big does a German Spaniel get?
A full-grown German Spaniel is a medium dog, weighing about 40–55 lb as an adult.
- Adult weight
- 40–55 lb
- Also in kilograms
- 18–25 kg
- Size class
- Medium
German Spaniel Size
As a medium breed, a German Spaniel reaches its adult weight earlier than a large dog — smaller breeds finish growing sooner (Hawthorne et al., 2004).
German Spaniel Growth Chart
What a German Spaniel puppy weighs week by week, from the growth curve FEDIAF publishes (Nutritional Guidelines 2025, Table VII-8a) for a dog whose expected adult weight is 21.5 kg. It is an average, not a target, and it is only valid from 8 weeks to one year — FEDIAF notes that growth patterns show a certain individual variability. Read a row as the middle of a spread.
| Age | Weight | % of adult weight |
|---|---|---|
| 8 weeks | 11 lb (4.8 kg) | 22% |
| 10 weeks | 15 lb (6.7 kg) | 31% |
| 12 weeks | 18 lb (8.3 kg) | 38% |
| 14 weeks | 21 lb (9.6 kg) | 45% |
| 16 weeks | 24 lb (10.7 kg) | 50% |
| 18 weeks | 26 lb (11.7 kg) | 55% |
| 20 weeks | 28 lb (12.6 kg) | 59% |
| 24 weeks | 31 lb (14.2 kg) | 66% |
| 28 weeks | 34 lb (15.5 kg) | 72% |
| 32 weeks | 37 lb (16.7 kg) | 78% |
| 36 weeks | 39 lb (17.7 kg) | 82% |
| 40 weeks | 41 lb (18.6 kg) | 86% |
| 44 weeks | 43 lb (19.4 kg) | 90% |
| 48 weeks | 44 lb (20.1 kg) | 94% |
| 52 weeks | 46 lb (20.8 kg) | 97% |
Common questions
How much does a full-grown German Spaniel weigh?
A German Spaniel weighs 40–55 lb (18–25 kg) as an adult. That range is the mass Wikidata publishes for the breed under a CC0 license, re-checked here every week — it is a typical weight across many adult dogs, not a target for one dog.
Is a German Spaniel a medium dog?
Yes — a German Spaniel counts as a medium breed, going by the middle of its adult weight range (18–25 kg). The cut-offs between small, medium, large and giant are a common veterinary convention rather than one official standard, so a breed near a boundary can be described either way elsewhere.
When does a German Spaniel stop growing?
Earlier than a large dog. Hawthorne et al. (2004) measured that smaller breeds finish growing sooner, so a German Spaniel reaches something close to its adult weight before a big breed would. We don't publish a month-by-month figure, because no source gives one breed by breed — and an invented number would be worse than none.
Why is there a range instead of one weight?
Because the source publishes a range. Within any breed, weight varies with sex, genetics, build and health, and a mixed-breed dog usually falls between its parents' breeds. Narrowing 40–55 lb down to a single number would look more precise while being less true.
Breeds of a similar size
Every dog calculator
- Dog Age Calculator — Your dog’s age in human years, the science-based way
- Puppy Weight Calculator — How big will your puppy get, by breed
- Dog Pregnancy Calculator — Your dog’s due date from her mating date
- Dog Calorie Calculator — How many calories your dog needs a day
- Dog Chocolate Toxicity Calculator — How much chocolate is dangerous for your dog, by weight
- Puppy Feeding Calculator — How much to feed a puppy, by weight and age
- Dog Benadryl Dosage Calculator — How much Benadryl you can give a dog, by weight
- Puppy Vaccination Schedule — Puppy shots by age, from the AAHA’s published guidelines
Weight varies within the German Spaniel by sex, genetics and health, and mixed-breed dogs fall between their parents. This is a typical range, not a guarantee.
Verified on . Based on Wikidata — dog breed mass (property P2067) (Wikimedia Foundation, query run 2026-07-22, CC0 license), Body-Weight Changes during Growth in Puppies of Different Breeds (Hawthorne et al., Journal of Nutrition, 2004, vol. 134, p. 2027S) and Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs (FEDIAF (European Pet Food Industry Federation), 2025 edition (growth curves Table VII-8a, growth energy VII-8b and VII-10)). See the method.