Jack Russell Terrier Weight Chart by Age
Jack Russell Terrier weight chart by month. Adults reach 11.0–13.2 lb (5.0–6.0 kg) under the FCI standard. Month-by-month healthy ranges from 8 weeks.
This small breed puppy growth chart covers dogs whose adult weight lands between 11 and 24 lb (5–11 kg). Use it when you know roughly how big your puppy will get but not the breed — a mixed breed, or a breed without its own chart here yet. The curve comes from veterinary records of millions of young dogs, grouped by adult size rather than by breed.
| Age | Weight range | % of adult |
|---|---|---|
| 2 months | 4–8 lb1.6–3.4 kg | 32% |
| 3 months | 5–11 lb2.4–5 kg | 47% |
| 4 months | 7–14 lb3–6.4 kg | 59% |
| 5 months | 8–17 lb3.5–7.7 kg | 70% |
| 6 months | 9–19 lb3.8–8.5 kg | 77% |
| 8 months | 10–21 lb4.3–9.6 kg | 87% |
| 10 months | 10–22 lb4.5–10 kg | 91% |
| 12 months | 10–23 lb4.6–10.2 kg | 92% |
| 18 months | 11–24 lb4.9–10.7 kg | 97% |
| 24 months | 11–24 lb5–11 kg | 100% |
Each row spans the whole class, from the lightest small females to the heaviest males. If you know the breed, its own page narrows this considerably.
| Breed | 3 months | 6 months | 12 months | Adult |
|---|---|---|---|---|
| Beagle | 9–11 lb | 15–19 lb | 19–23 lb | 20–25 lb |
| Boston Terrier | 6–12 lb | 9–19 lb | 11–23 lb | 12–25 lb |
| Cavalier King Charles Spaniel | 6–9 lb | 10–14 lb | 12–17 lb | 13–18 lb |
| Cavapoo | — | — | — | — |
| Dachshund | 7–15 lb | 12–25 lb | 15–30 lb | 16–32 lb |
| French Bulldog | 8–13 lb | 13–22 lb | 16–26 lb | 17–28 lb |
| Jack Russell Terrier | 5–6 lb | 8–10 lb | 10–12 lb | 11–13 lb |
| Miniature Poodle | 5–7 lb | 8–12 lb | 9–14 lb | 10–15 lb |
| Miniature Schnauzer | 5–10 lb | 8–16 lb | 10–19 lb | 11–20 lb |
| Pembroke Welsh Corgi | 10–12 lb | 15–21 lb | 18–25 lb | 20–27 lb |
| Pug | 6–9 lb | 11–14 lb | 13–17 lb | 14–18 lb |
| Shiba Inu | 8–11 lb | 13–18 lb | 16–21 lb | 17–23 lb |
| Shih Tzu | 4–8 lb | 7–12 lb | 8–15 lb | 9–16 lb |
If you know the breed, go to its page. The class chart above has to cover every small breed at once, so its range is wide by necessity; a breed page scales the same curve to that breed’s own adult weight range from the American Kennel Club standard and splits it by sex, which typically halves the range. Use this page when the breed is unknown or mixed, and the breed page when it is not.
Every small breed with a chart on this site is listed below.
Estimate your puppy’s adult weightAll size classes
Growth curves derived from Salt et al. (2017), used under CC BY 4.0. The full table and method are published here.
Jack Russell Terrier weight chart by month. Adults reach 11.0–13.2 lb (5.0–6.0 kg) under the FCI standard. Month-by-month healthy ranges from 8 weeks.
Cavapoo weight chart by size category. Adults run 4 to 18 lb (2 to 8 kg) depending on category. Month-by-month ranges for each, from veterinary growth curves.
Miniature Poodle weight chart by month. Adults reach 10.0–15.0 lb (4.5–6.8 kg) under the AKC standard. Month-by-month healthy ranges from 8 weeks.
Shiba Inu weight chart by month. Males reach about 23 lb (10.4 kg), females about 17 lb (7.7 kg). Month-by-month healthy ranges from 8 weeks.
Boston Terrier weight chart by month. Adults reach 12.0–25.0 lb (5.4–11.3 kg) under the AKC standard. Month-by-month healthy ranges from 8 weeks.
Miniature Schnauzer weight chart by month. Adults reach 11.0–20.0 lb (5.0–9.1 kg) under the AKC standard. Month-by-month healthy ranges from 8 weeks.
Cavalier King Charles Spaniel weight chart by month. Adults reach 13.0–18.0 lb (5.9–8.2 kg) under the AKC standard. Month-by-month healthy ranges from 8 weeks.
Pug weight chart by month. Adults reach 14.0–18.0 lb (6.4–8.2 kg) under the AKC standard. Month-by-month healthy ranges from 8 weeks.
Beagle weight chart by month. Males reach 20.0–25.0 lb (9.1–11.3 kg), females 20.0–23.0 lb (9.1–10.4 kg). Month-by-month healthy ranges from 8 weeks.
Dachshund weight chart by month. Males reach 16.0–32.0 lb (7.3–14.5 kg), females 16.0–32.0 lb (7.3–14.5 kg). Month-by-month healthy ranges from 8 weeks.
French Bulldog weight chart by month. Males reach 20.0–28.0 lb (9.1–12.7 kg), females 17.0–24.0 lb (7.7–10.9 kg). Month-by-month healthy ranges from 8 weeks.
Pembroke Welsh Corgi weight chart by month. Males reach 22.0–26.5 lb (10.0–12.0 kg), females 19.8–24.3 lb (9.0–11.0 kg). Month-by-month healthy ranges from 8 weeks.
Shih Tzu weight chart by month. Males reach 9.0–16.0 lb (4.1–7.3 kg), females 9.0–16.0 lb (4.1–7.3 kg). Month-by-month healthy ranges from 8 weeks.