The time it takes for your puppy to achieve mature weight is decided on his overall size. Toy and tiny breeds will grow faster than massive breeds generally. Toy breeds can do adult weight as early as eight months, whereas the most important big breeds will grow until they're two or three years old. Small, medium and giant breeds will all fall under an equivalent category. With Monkoodog’s Puppy Weight Calculator you can keep a good look at your pooch’s weight according to his breed and look out for abnormalities.