Puppy Weight Calculator
Estimate how big your puppy will be as an adult, based on its current weight and age.
Most accurate between 8 and 20 weeks
Your result
Estimated adult weight
43 lb · 19.7 kg
Likely range (±15%)
37–50 lb · 16.7–22.6 kg
How the estimate works
This uses a common rule of thumb: divide the puppy's weight by its age in weeks, then multiply by 52. It assumes steady growth through the first year and works best for small and medium breeds between 8 and 20 weeks old.
Large and giant breeds keep growing until 18–24 months, so their final weight may be higher. Your puppy's parents' weights and your vet's assessment are the best guides.
Frequently asked questions
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