What is the ideal weight for a giant dog? There is no single number, because giant dogs range from a lean 34 kg Tibetan Mastiff to a 104 kg Mastiff — but there is a single method that works for all of them: the breed's typical weight range, checked against body condition. A giant dog is one in the over-40 kg size class, and this guide is the giant dog ideal weight calculator in words: the weight chart by breed, how to judge body condition by feel and by sight, how to weigh a giant dog at home, and how to help a giant dog lose weight — or gain it — safely.
Weight matters more for giant dogs than for any other size, because every extra kilogram loads joints that are already working hard under an enormous frame. A giant dog carrying 5 kg too much is carrying a heavy load on every step, every day — and that load shows up in stiffness, slower movement, and a shorter life, in a breed group that already lives only 7 to 10 years. The good news is that weight is the one health factor owners control almost completely: measured food, daily exercise, and a monthly weigh-in are enough, and the chart below tells you what number to aim for. The figures are ranges from published breed standards, not single targets — aim for the range, then use body condition to find your dog's place inside it.
What is a giant dog's ideal weight?
A giant dog's ideal weight is the weight at which the dog is lean, muscular, and moving freely — ribs easily felt under a thin layer of fat, a visible waist from above, and a tummy tuck from the side. For most giant breeds that weight falls inside the breed's typical range in the chart below, but the range is wide on purpose: a working-line Anatolian Shepherd Dog at 36 kg and a show-line Anatolian at 68 kg can both be at their ideal weight, because they are different builds and different sexes. What matters is not the exact number on the scales but the shape of the dog at that number.
That is why vets use a body condition score rather than a single weight. The common scale runs from 1 to 9: 1 is emaciated, 4 to 5 is ideal, and 9 is severely obese. An ideal giant dog scores 4 or 5 — ribs felt without pressing hard, waist visible from above, tummy tucked from the side, and no fat pads over the hips or shoulders. A dog that scores 6 or 7 is overweight; 8 or 9 is obese and needs a vet-supervised plan. Learn the feel of your dog at its ideal weight, and you can judge it every week without scales — which matters, because weighing a 70 kg dog at home is not always practical. The dog ideal weight calculator gives a starting range for any breed and size, and the overweight dog signs guide explains the score in more detail.
Giant dog ideal weight chart by breed
Use this chart to find your breed's typical adult weight range. The ranges come from published breed standards, and the lifespan column is included because weight and lifespan are linked: giant breeds typically live 7 to 10 years, and a lean giant dog tends to live longer inside that range than an overweight one.
| Breed | Typical adult weight | Typical lifespan |
|---|---|---|
| Great Dane | 50–79 kg | 7–10 years |
| Saint Bernard | 54–82 kg | 8–10 years |
| Mastiff | 54–104 kg | 6–10 years |
| Newfoundland | 45–68 kg | 9–10 years |
| Irish Wolfhound | 54–82 kg | 6–8 years |
| Great Pyrenees | 39–52 kg | 10–12 years |
| Scottish Deerhound | 34–50 kg | 8–9 years |
| Anatolian Shepherd Dog | 36–68 kg | 11–13 years |
| Boerboel | 68–91 kg | 9–11 years |
| Leonberger | 41–77 kg | 8–9 years |
| Neapolitan Mastiff | 50–68 kg | 7–9 years |
| Tibetan Mastiff | 34–68 kg | 10–12 years |
A few things to notice in the chart. First, the ranges are very wide: a Mastiff typically weighs 54 to 104 kg, nearly double from the light end to the heavy end, because males are much heavier than females and lines differ. A Great Dane typically weighs 50 to 79 kg, and a Saint Bernard 54 to 82 kg. Second, some giant breeds live longer than the size alone would predict — the Anatolian Shepherd Dog typically lives 11 to 13 years and the Tibetan Mastiff 10 to 12, against 7 to 10 for giant dogs as a whole — which is a reminder that size is a strong pattern, not a fixed fate. Third, for giant breeds without a published breed-standard range — many FCI and international breeds — the typical range for a giant dog is 40 to 90 kg, which is an estimate, not a breed-specific measurement. If your breed is not in the chart, use 40 to 90 kg as a starting point and let body condition and your vet set the real target.
How to tell if your giant dog is overweight
Start with your hands, not the scales. Stand your dog up and run your hands along its ribs: you should feel each rib easily under a thin layer of fat, without pressing hard. If you have to press to find the ribs, the dog is overweight; if you cannot feel them at all, the dog is obese. Then look from above: there should be a visible waist behind the ribs, narrower than the chest. Then look from the side: the tummy should tuck up behind the ribs, not hang in a straight line or sag. A giant dog that fails any of these checks is carrying too much weight, even if the number on the scales still falls inside the breed's range — because the range is wide and your dog may belong at the light end of it.
Other signs are easier to miss. A dog that pants more on walks, tires sooner, hesitates before jumping into the car, or struggles to get up after rest may be overweight rather than simply ageing — and giant breeds are prone to joint problems, so extra weight and joint wear feed each other. Weigh the dog monthly and write the number down: a slow gain of 1 kg a month is 12 kg in a year, which is a fifth of a 60 kg dog's body weight, and it is invisible day to day. If you are unsure, ask your vet to score body condition at the next visit and to set a target weight — that target, not the breed chart, is the number to work towards. The Great Dane food guide and the Mastiff food guide show how food and weight connect breed by breed.
How to weigh a giant dog
The easiest way to weigh a giant dog is at the vet, where platform scales take dogs of any size — ask to weigh your dog at every visit, even a routine one, so you build a record. At home, bathroom scales and the hold-and-subtract method do not work for a 60 or 70 kg dog, so use a different approach: stand the dog on the scales with its front paws on and its back paws off, note the number, then turn the dog around and weigh the back half, and add the two together. It is approximate, but it is good enough to track a trend. Better still, buy or borrow a set of large platform scales, or use the scales at a pet shop or a feed merchant — many have them and will let you weigh your dog for free.
Weighing is only useful if it leads to action. If the number is rising month by month, cut food by about 10% and re-weigh in a month. If it is falling without a planned diet, mention it to your vet — unplanned weight loss in a giant dog can be an early sign of illness, and it deserves a check rather than a celebration. The dog food calculator works out daily calories for any weight, so once you know the target weight you can work out the food to match it.
How to help a giant dog lose weight safely
The safest way to help a giant dog lose weight is slow and boring: measure the food, cut it by about 10%, keep treats under 10% of daily calories, and exercise every day. A 60 kg giant dog that needs about 2,415 calories a day should lose weight on about 2,175 — a small cut, not a crash diet — and the weight should come off over weeks and months, not days. Weigh the food with scales or a measuring cup, not a mug or a handful, and weigh the dog monthly: if the number is not moving after a month, cut another 10% and check again. Do not put a giant dog on a crash diet or a home-made weight-loss food without veterinary advice — rapid weight loss can cause health problems of its own, and a dog that is hungry all the time will raid bins and beg, which undoes the plan.
Exercise should rise gently, not suddenly. A giant dog that is overweight and unfit should start with short, regular walks — twenty to thirty minutes, twice a day — and build up over weeks, rather than a long hike on Saturday that leaves it lame on Sunday. Swimming is a good option for giant dogs with sore joints, because it works muscles without loading them. And involve the whole household: a weight-loss plan fails when one person measures food carefully and another hands out biscuits. Agree the daily ration, agree the treat budget, and keep a note on the fridge so everyone feeds the same amount. The giant dog food guide gives the calorie tables by weight that make the plan practical.
How to help an underweight giant dog gain weight
An underweight giant dog — ribs, spine, and hip bones visible, no fat cover, a score of 1 to 3 — needs a vet check before extra food. Weight loss or failure to gain weight in a giant dog can be caused by parasites, dental pain, thyroid or kidney problems, or a food that does not suit the dog, and feeding more of the same food will not fix any of those. Once the vet has ruled out illness, the usual advice is to increase food gradually — about 10% more, in an extra meal rather than a bigger one, so the dog's digestion copes — and to use a calorie-dense, complete and balanced food suited to the dog's life stage. Weigh weekly while the dog gains, and stop increasing once the ribs are felt under a thin layer of fat rather than seen.
Do not try to fatten a giant-breed puppy, and never overfeed a puppy to make it grow faster: rapid growth and excess weight in a giant-breed puppy strain developing joints, and the puppy should stay lean enough that you can feel its ribs easily. The best puppy food for large breeds guide explains why steady growth matters more than fast growth. If your giant dog is a senior that has lost weight, mention it to your vet promptly — weight loss in an older giant dog is often the first sign of a health problem, and early help works better than late help.
What affects a giant dog's ideal weight
Age is the biggest factor after breed. Puppies grow for up to two years and their weight changes weekly; adults should hold steady; seniors often lose muscle and may need fewer calories but the same good protein, and some seniors gain weight because they move less while food stays the same. Neutering typically cuts calorie needs by about 10 to 20%, so expect to cut food after the operation and watch the waistline for the next few months. Activity matters too: an Anatolian Shepherd Dog that works all day needs more food than one that sleeps in a house, and a Newfoundland that swims and walks daily needs more than one that rests.
Sex and build matter as well — males are usually much heavier than females in giant breeds, and working lines are usually lighter than show lines — which is another reason the chart gives ranges rather than single numbers. Health conditions change the target entirely: a dog with joint disease benefits from being at the light end of its range, while a dog recovering from illness may need to be heavier for a while. In every case the target is a conversation with your vet, not a number from a chart. Use the chart to know roughly where your dog should be, use body condition to judge where it actually is, and use your vet to set the plan that closes the gap. The Leonberger food guide and the Boerboel food guide show how the same method applies breed by breed.
For related reading, see the dog ideal weight calculator, the giant dog food guide, the giant dog age guide, the overweight dog signs guide, the Great Dane food guide, the dog breeds hub.
Frequently asked questions
What is the ideal weight for a Great Dane?
A Great Dane typically weighs 50 to 79 kg as an adult. Within that range, the ideal weight is the one at which the ribs are easily felt under a thin layer of fat, a waist is visible from above, and the tummy tucks up from the side. Most Great Danes do best at the lighter end of the range if they are active, and heavier only if they are large-framed males.
How do I know if my giant dog is overweight?
Feel the ribs: you should feel them easily without pressing hard. Look from above for a visible waist behind the ribs, and from the side for a tummy tuck. If you have to press to find the ribs, or there is no waist, the dog is overweight. Weigh the dog monthly and ask your vet to score body condition at the next visit.
How do I weigh a 70 kg dog at home?
Bathroom scales and the hold-and-subtract method do not work at that size. Weigh the front half and the back half separately on bathroom scales and add the two together, use large platform scales, or use the vet's scales at every visit. A pet shop or feed merchant may also have platform scales you can use.
How fast should a giant dog lose weight?
Slowly, over weeks and months, with a small cut of about 10% of daily food and a monthly weigh-in. Rapid weight loss can cause health problems, and a crash diet is hard to sustain. If the weight is not moving after a month on a 10% cut, cut another 10% and check again — and ask your vet to set the target and the pace.
Do giant dogs need a different food to stay at a healthy weight?
Not necessarily a different brand, but the right amount of a complete and balanced food suited to the dog's life stage, measured every day. A giant-breed formula can help in the puppy stage, because it is designed for steady growth, and a senior formula can help older dogs. What matters most is the amount: weigh the food, keep treats under 10% of daily calories, and adjust by the monthly weigh-in.
When should I ask my vet about my giant dog's weight?
At the next routine visit if the dog is overweight or underweight, and promptly if weight is changing without a planned diet — especially weight loss in a senior dog, which can be an early sign of illness. Your vet can score body condition, set a target weight, and check for the health problems that cause weight change.
Results on this page are estimates for general information only and are not veterinary advice. If your pet is ill, underweight, overweight, pregnant, or has a health condition, consult your veterinarian before changing diet or care.