How to tell how big a puppy will get

The surest way is your puppy's age and weight together. Type them to see its grown size.

weeks
lb
Size group when grown, if you know it
Grown, your puppy will weigh about ? lb

  • Grown weight?
  • Crate to buy once?
  • Harness?
  • Collar?
General information, not veterinary advice. Breeds, mixes and individual puppies vary; your vet can tell you how your puppy is growing.

Four ways, compared

  1. Age and weightPuppies of the same size group grow in a similar pattern, so today's weight and age point to the grown weight. This is what Pupsize does.
  2. The parentsA puppy usually grows to about the size of its parents. If they differ, expect something between them.
  3. The 16-week ruleDoubling the weight at 16 weeks fits small and medium dogs fairly well. Large and giant puppies have further to go, about 2.4 and 3 times.
  4. Paw sizeBig paws are a loose hint at best: many puppies' paws look large for a while, whatever size they grow to.

For example, a puppy of 20 lb at 16 weeks, breed unknown: doubling gives 40 lb. Pupsize places it as a medium dog of about 32 to 49 lb, since a medium puppy is about 50% of its grown weight at 16 weeks.

Questions

Can you tell how big a puppy will get by its paws?

Only loosely. Paws often look big on a young puppy of any size. Age and weight together are a better guide.

At what age can you tell how big a puppy will be?

From about 8 weeks you can get a rough range. By 16 weeks it's a fair estimate, and by 6 months a close one for most dogs.

How accurate is the estimate?

It's a typical figure for the size group, not a promise. The range shows how sure it is, and it narrows as your puppy gets older.