Important: Pitbull is commonly used for several different dogs and mixes. This calculator is intended primarily as an informational estimate for American Pit Bull Terrier-type dogs. Genetics, sex, skeletal frame, nutrition, activity, neutering status and body condition can all affect weight. A dog's healthy weight cannot be determined from the scale alone. If your dog is rapidly losing/gaining weight, has poor appetite, or you are concerned about body condition, consult a veterinarian.