Puppy weight calculators are not 100% accurate, but they will give you an idea of what size your dog should be as an adult. The results from these calculators may vary depending on the type of calculator you use. Some are more accurate than others and some may even take into acount other factors such as gender or health issues that may affect growth rate in young puppies. The size of your dog can be determined by a number of factors, and is affected by his genetics and how he was raised. But there's no way to tell exactly how big your puppy will grow to be. Genetics can play a large role in determining how big your dog will get. If both parents are small, then you can expect your puppy to be on the smaller side as well. However, if both parents are large dogs, then you may have a larger puppy on your hands! The other factor that will affect your dog 's size is his environment. Puppies who are given plenty of food and water and allowed to exercise often grow into much bigger dogs than those who are not given enough food or exercise while they're young. For example, if you have two puppies — one who gets plenty of food and water and has plenty of time each day for exercise and one who doesn't — the one who eats well and exercises often will likely grow up to be much bigger than the other puppy did when they were young!