Free dog calculator
Puppy Weight Calculator
This puppy weight calculator predicts your puppy’s adult weight from its weight today, its age and its size group. Instead of a doubling rule, it uses the growth records behind a 2017 veterinary growth chart study: we reworked the study’s public data into week-by-week growth percentages for 73,586 puppies.
- Growth records of 73,586 puppies
- Our own analysis of a published vet dataset
- Free, no sign-up or email
Predictions are averages from healthy purebred puppies. Your vet’s body condition check tells you more about whether your puppy is growing well than any adult weight estimate.
How the puppy weight calculator works
In 2017, Carina Salt and colleagues at the WALTHAM Centre for Pet Nutrition and the University of Liverpool built growth standard charts from Banfield Pet Hospital records collected between 1994 and 2013. They grouped breeds into size categories by adult weight, because growth curves within a size group matched closely, and published the underlying data, nearly 15 million weight records, under an open license.
We used that data directly. For each dog that had a normal body condition score at visits between 18 months and 3 years, and no thin or heavy score in that window, we took the average of those adult weights. Each coded breed went into a size group by its average adult weight in the data, using the study’s cut-offs. Then we worked out what share of that adult weight the same dog weighed at every puppy visit from 8 weeks to a year, and took the median and middle 50% for each week and size group.
The calculator divides your puppy’s weight by the median share for its age. A 12-week-old small-breed puppy at 4.5 lb, for example, is typically at 37% of adult weight, which points to about 12.3 lb as an adult.
Puppy growth chart: share of adult weight by age
| Size group | 8 wk | 12 wk | 16 wk | 20 wk | 26 wk | 36 wk | 52 wk |
|---|---|---|---|---|---|---|---|
| Toy (under 14 lb (6.5 kg)) | 27% | 38% | 50% | 60% | 72% | 83% | 90% |
| Small (14 to 20 lb (6.5 to 9 kg)) | 25% | 37% | 50% | 61% | 74% | 86% | 92% |
| Medium (20 to 33 lb (9 to 15 kg)) | 22% | 32% | 45% | 57% | 70% | 82% | 90% |
| Medium-large (33 to 66 lb (15 to 30 kg)) | 18% | 28% | 41% | 53% | 68% | 83% | 92% |
| Large (66 to 88 lb (30 to 40 kg)) | 17% | 28% | 41% | 53% | 68% | 84% | 93% |
| Giant (over 88 lb (40 kg)) | 14% | 23% | 36% | 48% | 64% | 81% | 91% |
Median share of adult weight in each group, from our analysis of the Salt et al. data. Toy and small puppies reach half their adult weight at about 17 weeks, while giant puppies take until about 21 weeks. At a year old, small dogs are within about 8% of their adult weight.
Dachshund puppy weight chart
Turned around, the same curves tell you what a puppy should weigh along the way to a given adult size. These are median weights in pounds, using the toy group for miniatures and the small group, where the study placed the breed, for standards.
| Adult weight | 8 wk | 10 wk | 12 wk | 16 wk | 20 wk | 26 wk | 36 wk | 52 wk |
|---|---|---|---|---|---|---|---|---|
| Miniature, 9 lb | 2.4 | 2.8 | 3.4 | 4.5 | 5.4 | 6.5 | 7.5 | 8.1 |
| Miniature, 11 lb | 3.0 | 3.4 | 4.1 | 5.5 | 6.6 | 7.9 | 9.1 | 9.8 |
| Standard, 16 lb | 4.0 | 4.7 | 5.9 | 8.0 | 9.8 | 11.9 | 13.7 | 14.7 |
| Standard, 20 lb | 5.1 | 5.9 | 7.3 | 10.0 | 12.3 | 14.8 | 17.2 | 18.4 |
| Standard, 25 lb | 6.3 | 7.3 | 9.2 | 12.5 | 15.3 | 18.6 | 21.4 | 23.0 |
The 52-week column sits a little under the adult weight because the dogs in the data kept filling out after their first birthday. Use it as a rough guide, not a target. A puppy tracking a little above or below its row is normal; one drifting across rows over a few weigh-ins is worth asking your vet about. Our page on how big a miniature dachshund gets covers adult sizes in more detail.
Which size group is my puppy?
| Group | Puppies in our analysis | Breeds the study placed here |
|---|---|---|
| Toy | 26,762 | Chihuahua, Yorkshire terrier, Maltese, toy poodle, Pomeranian, miniature pinscher |
| Small | 6,061 | Dachshund, shih tzu, Pekingese, bichon frise, Jack Russell terrier, Lhasa apso, miniature schnauzer |
| Medium | 9,295 | Beagle, pug, Boston terrier, American cocker spaniel, fox terrier |
| Medium-large | 11,584 | Boxer, basset hound, Siberian husky, English bulldog, Australian shepherd |
| Large | 15,346 | Labrador, golden retriever, German shepherd, American bulldog |
| Giant | 4,538 | Rottweiler, Great Dane, mastiff |
Breed placement follows the study’s Table 1, which used each breed’s average adult weight. Dachshunds as a breed fell in the small group. A miniature dachshund, 11 lb and under as an adult under the AKC standard, fits the toy group by weight.
Mini or standard? Real puppies through the calculator
The most common puppy question on r/Dachshund is some version of “how big will mine get?” We ran four puppies from those threads through the calculator, using the toy group for puppies sold as miniatures. The weights are the owners’ own.
| Puppy | Age and weight | Predicted adult | Middle half |
|---|---|---|---|
| Both parents minis (6 and 10 lb) | 8 weeks, 5 lb | 18.4 lb | 15.2 to 22.3 lb |
| Owner asking: mini or tweenie? | 15 weeks, 6.1 lb | 13.0 lb | 11.4 to 15.2 lb |
| Sold as a mini | 14 weeks, 3.8 kg (8.4 lb) | 19.3 lb | 16.6 to 22.6 lb |
| Tiny at 9 to 10 weeks | 9 to 10 weeks, 2 lb | 6.5 to 7.0 lb | 5.5 to 8.5 lb |
The owner of the first puppy, in a thread comparing 8-week weights, suspected a standard, and the numbers agree: 18 lb is standard territory, since AKC lists miniatures at 11 lb and under. The 15-week-old lands between the two AKC classes, the size owners call a tweenie, which isn’t an official class.
The last puppy is a useful check on the calculator. Her owner, in the same 8-week thread, says she weighed 8 to 9 lb at 9 months. At 39 weeks a toy-group puppy is typically at 85% of its adult weight, which points to an adult of about 9.4 to 10.6 lb, above the range the calculator gave at 10 weeks. That’s the pattern in the data too: the spread between puppies is widest at the youngest ages. At 8 weeks the top of the middle-half range is 46% above the bottom; by 26 weeks it’s 25%. Weigh again every few weeks and rerun it.
What the prediction can’t see
Mixed breeds
The records are from purebred dogs. For a mix, pick the group that matches the parents’ adult weight.
Neutering
The study found neutering before 37 weeks nudged growth slightly up and later neutering slightly down, but both were small next to the differences between dogs.
Body condition
A chubby puppy reads as a bigger adult. The prediction assumes healthy body condition, like the dogs it came from.
Breed codes
Breeds in the public data are coded, so we can’t pull out dachshunds alone. Results are by size group.
Puppy weight questions
How big will my dachshund puppy get?
Pick toy if you expect a miniature and small if you expect a standard, then enter its weight and age. AKC lists miniatures at 11 pounds and under at 12 months, and standards usually between 16 and 32 pounds.
At what age is a puppy half its adult weight?
In our analysis, at about 17 weeks for toy and small dogs, 18 weeks for medium dogs, and 21 weeks for giant breeds.
When do puppies stop growing?
Salt and colleagues note that very small dogs reach maturity at 8 to 12 months, while larger breeds can take up to 24 months. In our numbers, small-breed puppies are at about 92% of adult weight by 52 weeks.
Sources and method
- Salt C. et al., Growth standard charts for monitoring bodyweight in dogs of different sizes, PLOS ONE, 2017: size categories, breed placement, neutering effects.
- Salt C. et al., supporting data, University of Liverpool DataCat (doi 10.17638/datacat.liverpool.ac.uk/377), CC-BY: 14,957,947 visit records analyzed by dachshundguides.com in October 2026.
- American Kennel Club, Official Standard of the Dachshund: miniature and standard weights (read October 2026).