Dog Size Calculator

Breed standard most reliable. Parents' sizes. Growth charts: most puppies reach 75% adult weight by 6 months, 90% by 9 months. Large breeds grow until 18–24 months.

Growth non-linear. Fastest month 2–3; slows month 4+. Large breeds plateau slower. Nutrition affects growth rate. Weight at 16 weeks better predictor than week-by-week formula.

Small breeds: 10–12 months. Medium: 12–15 months. Large: 18–24 months. Skeleton plates close later in large breeds. Continued growth past 12 months possible.