Puppy Size Chart: Read Growth by Adult Size
Use the calculator for your puppy’s current range, then compare broad adult-weight bands and maturity timing without treating a chart as a veterinary growth standard.
Start with the basics
Add a few details to see a planning range for your puppy’s adult weight.
Example adult range
45-60 lb
Curve used: Medium · 25-55 lb
Medium breeds usually keep filling out through the first year. Use this as context, not a diagnosis.
What is a puppy size chart useful for?
A puppy size chart helps organize two related questions: how much a puppy may weigh as an adult and how long different size groups may keep maturing. It is most useful for planning equipment, setting expectations, and deciding what to measure next.
The bands on this page summarize the adult-weight groupings described in Royal Canin Academy’s explanation of Waltham growth charts. They are population-level references, not a custom curve for your dog and not a replacement for a veterinary growth assessment.
How to read the size bands
Start with the current age and weight in the calculator, then choose the closest expected adult size. Compare the output with the broad band that seems plausible. If two bands could fit, keeping both in view is more honest than choosing the smaller one because it looks neater.
The example breeds are illustrations of the bands, not limits. Breed, sex, parent size, body frame, nutrition, health, and mixed ancestry can move an individual puppy outside a broad grouping. Repeated weigh-ins and body condition add more useful information over time.
Use the chart for practical planning
Size affects crate dimensions, carrier fit, harness strength, travel setup, and how much room an adult dog may need. Measure body length and height as well as weight, and choose adjustable equipment while the puppy is still growing.
Keep the chart beside a simple record rather than using it as a target line. Note the puppy’s age, weight, date, and size category, then compare later measurements with the earlier direction. If you are choosing a crate, carrier, or harness, measure length, height, and chest as well as weight; a dog can fit one weight band while needing a different shape. Broad charts are useful for planning and questions, but an individual puppy’s body condition and veterinary history remain more important than matching an average. For food, exercise, illness, or body-condition decisions, do not use an online chart as a prescription. If growth stalls, changes sharply, or comes with symptoms, bring the measurement record to a qualified veterinarian.
Adult-weight groupings for broad comparison
These five groupings are a compact way to read the reference framework. They help orient the calculator result without pretending that every breed or puppy follows one exact line.
| Estimated adult weight | Illustrative breed examples |
|---|---|
| Under 6.5 kg (14.3 lb) | Yorkshire Terrier, Pomeranian, Toy Poodle |
| 6.5–9 kg (14.3–19.8 lb) | Miniature Schnauzer, Shih Tzu, Bichon Frise |
| 9–15 kg (19.8–33.1 lb) | Pug, Beagle, Boston Terrier |
| 15–30 kg (33.1–66.1 lb) | Boxer, Chow Chow, English Bulldog |
| 30–40 kg (66.1–88.2 lb) | Golden Retriever, German Shepherd Dog, American Bulldog |
Size changes the timetable too
Royal Canin’s broad maturity guidance shows why toy, medium, and giant puppies should not be placed on one universal schedule. Use these ages as orientation, not a deadline.
| Size group | Adult-weight reference | Broad maturity timing |
|---|---|---|
| Extra-small | Around 10 lb | Around 8 months |
| Mini | 10–25 lb | Around 10 months |
| Medium | 26–55 lb | Around 12 months |
| Maxi | 56–100 lb | Around 15 months |
| Giant | 101 lb and up | Around 18–24 months |
Sources behind this chart
The weight bands and maturity references are linked to the Royal Canin Academy and Royal Canin pages used to build this summary. Follow the sources for their full methodology and context.
Questions about puppy size charts
What does a puppy size chart show?
It shows broad adult-weight groupings and, in some references, approximate maturity timing by size. It does not give a guaranteed adult weight for one puppy or diagnose whether growth is healthy.
How should I use a puppy size chart?
Enter a current age and weight into the calculator, choose the closest expected adult-size category, and compare the result with a broad reference band. Recheck after later weigh-ins and keep neighboring bands in mind when the information is uncertain.
Can I use the chart for a mixed-breed puppy?
Yes, as a broad planning reference. Mixed ancestry can make the final frame and maturity timing harder to predict, so current measurements and a series of weigh-ins matter more than assigning a precise breed category.
When should a veterinarian check my puppy’s growth?
Ask a veterinarian when weight gain stops, drops unexpectedly, changes sharply, or comes with poor appetite, low energy, vomiting, diarrhea, or another concern. A chart cannot examine a puppy or identify the cause of a change.
A chart is planning context
Puppy Weight Estimator provides general educational information and broad planning ranges. It is not professional veterinary advice, a diagnosis, or a feeding prescription. Use a qualified veterinarian for health, nutrition, body-condition, and growth concerns.