Newfoundland weight chart: how to read it
A Newfoundland is a genuine giant breed, and giant breeds grow on a completely different timeline to a small or medium dog — slower, over a much longer period, often not reaching full physical maturity until somewhere between eighteen months and two years old. A weight chart is a guide to that long, gradual curve, not a target to hit by any particular week.
How a Newfoundland's growth typically goes
Adult Newfoundlands commonly weigh somewhere in the region of 45 to 68kg, with plenty of natural variation and males generally running heavier than females. Unlike a small breed that is close to adult size within a year, a Newfoundland is still actively growing and filling out well into its second year, which is a much longer window for things to go right or wrong nutritionally.
That long growth period is exactly why a large or giant-breed puppy formula, rather than a standard all-breed puppy food, is generally recommended for this breed — it is built to support steadier, more controlled growth over that extended timeline rather than the fastest growth a food could technically produce.
What matters more than a single number on a chart
For a giant breed especially, the rate of growth matters more than hitting a specific weight at a specific age. Growing too quickly, rather than too slowly, is generally considered the greater concern for large-breed puppies, since it puts more strain on developing joints and bones during a period when they are still forming.
A single weigh-in that sits above or below an average chart figure is far less informative than the trend over several weeks — steady, gradual gain in proportion to your puppy's frame is the reassuring pattern to look for, rather than comparing against a generic number pulled from an average across the breed.
When to talk to your vet about growth
Routine puppy check-ups are the natural point to have a vet assess how your Newfoundland is growing, since they can track your specific puppy against their own earlier measurements rather than a generic breed chart. Large and giant breeds are often monitored a little more closely than smaller ones for exactly this reason.
Mention it sooner if your puppy's growth looks like it has sped up or slowed down noticeably from their own earlier pattern, or if you are ever unsure whether the amount you are feeding is appropriate for a breed that stays in a rapid-growth phase for so much longer than most.
Common questions
- How big does a Newfoundland get?
- Adult Newfoundlands typically weigh somewhere in the region of 45 to 68kg, with males usually heavier than females, though individual dogs vary. It is one of the larger commonly kept breeds, and its size is a major factor in how it should be fed as a puppy.
- When does a Newfoundland stop growing?
- Newfoundlands typically continue growing until somewhere between eighteen months and two years old, considerably longer than most breeds. This extended growth period is why a large or giant-breed puppy food, fed for longer than a standard breed would need it, is generally recommended.
- Is fast growth a problem for a Newfoundland puppy?
- Growing too quickly is generally considered more of a concern than growing a little slowly for a giant breed, since rapid growth puts more strain on developing joints. A large-breed puppy formula fed according to its guidelines is intended to support steadier growth rather than the fastest possible rate.
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Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.