Puppy Weight Predictor
Curious how big your puppy will get? This calculator uses standard breed-size growth curves to estimate your dog's adult weight from their current weight and age.
This is a statistical estimate based on typical breed-size growth curves, not an exact prediction — genetics, sex, and neuter status also affect final size. For a breed-specific estimate, ask your vet.
Know the size, plan the budget
Once you know roughly how big your dog will get, it's much easier to budget for food, crates, and vet care. See our full cost breakdown by size.
Read the dog cost guideGet a pet insurance quote before growth spurts get expensive
Larger breeds are more prone to joint and growth-related issues. Getting insured while your puppy is young usually means lower premiums and no pre-existing condition exclusions later.
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How this calculator works
Puppies of different adult sizes reach their full weight on different timelines: small breeds mature by about 9-10 months, medium breeds by about 12 months, large breeds by 12-18 months, and giant breeds can keep filling out until 18-24 months. At any given age, a puppy has typically reached a predictable percentage of their eventual adult weight. This tool inverts that curve: it divides your puppy's current weight by the expected percentage of adult weight for their age and size category to estimate the adult weight.