How heavy is a fully grown Great Dane?

Great Danes are one of the largest breeds, with adult dogs — particularly males — commonly reaching well into the tens of kilograms. Individual weight varies with build and lines, so a vet is the best judge of whether your own dog's weight is appropriate for their frame.

Is it bad for a Great Dane puppy to grow too fast?

Yes, growing too quickly during puppyhood is linked in veterinary guidance to a higher risk of joint and skeletal problems in giant breeds. A large or giant-breed puppy food, formulated to manage growth rate rather than maximise it, is generally recommended for this reason.

At what age is a Great Dane fully grown?

Giant breeds like the Great Dane take considerably longer to mature than smaller dogs, often continuing to fill out well beyond their first year. A vet can give a better sense of where your individual puppy sits in that process than a fixed age alone.

Great Dane weight chart: what to expect

Great Danes are one of the largest dog breeds kept as pets in the UK, and adult dogs commonly reach well into the tens of kilograms, with males typically ending up noticeably heavier than females. What matters most for a growing Great Dane puppy isn't hitting a specific number early — it's growing at a steady, controlled rate rather than as fast as possible.

How big a Great Dane gets

As one of the tallest and heaviest breeds generally recognised, an adult Great Dane is a genuinely large animal, with males typically outweighing females by a noticeable margin. Individual dogs vary a fair amount depending on their particular lines and build, so any single figure is only ever a rough guide.

Because they're such a large breed, Great Danes also take considerably longer to reach full adult size than a small or medium dog does, often continuing to fill out well past their first birthday.

Why growth rate matters more than any single number

Giant breeds like the Great Dane are known for the risk of growing too quickly during puppyhood, which veterinary guidance links to a higher risk of joint and skeletal problems developing later on. This is one of the main reasons a puppy food specifically formulated for large or giant breeds — which manages calorie and calcium intake more carefully than a standard puppy formula — is generally recommended over an all-purpose puppy food.

A vet who can see your individual puppy's growth curve is in a far better position to judge whether they're growing at an appropriate rate than a general chart, since what counts as "too fast" depends on the individual dog rather than a single fixed threshold.

Reading a weight chart properly

Track your puppy's weight over time rather than judging any single weigh-in against a chart in isolation. A steady, gradual upward trend tells you far more than one reading compared against an average for the breed.

If your Great Dane puppy seems to be growing unusually fast, or looks disproportionate for their age, that's worth raising with a vet rather than trying to slow growth down yourself through diet changes.

Common questions

How heavy is a fully grown Great Dane?: Great Danes are one of the largest breeds, with adult dogs — particularly males — commonly reaching well into the tens of kilograms. Individual weight varies with build and lines, so a vet is the best judge of whether your own dog's weight is appropriate for their frame.
Is it bad for a Great Dane puppy to grow too fast?: Yes, growing too quickly during puppyhood is linked in veterinary guidance to a higher risk of joint and skeletal problems in giant breeds. A large or giant-breed puppy food, formulated to manage growth rate rather than maximise it, is generally recommended for this reason.
At what age is a Great Dane fully grown?: Giant breeds like the Great Dane take considerably longer to mature than smaller dogs, often continuing to fill out well beyond their first year. A vet can give a better sense of where your individual puppy sits in that process than a fixed age alone.

Sources

Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.

Blue Cross — Pet advice

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.