Dog Size Calculator: Predict Your Puppy's Adult Weight and Height

Your details

Age in whole weeks, from 6 weeks upward. Growth benchmarks below 6 weeks are too variable to predict from, so the calculator starts there. Tip: 8 weeks = 2 months, 16 weeks = 4 months.
weeks
Your puppy's weight today. Use a postal or baby scale for accuracy under 5 lb.
lb
If unsure, use the expected adult weight of the breed. Mixed breeds can follow an average of parental sizes.
Male dogs typically weigh 10-20% more than females of the same breed.
Predicted adult weightMid growth stage
19.2

Estimated weight at full maturity

Weight unitlb
Growth completed52%
Size categoryMedium
Estimated shoulder height14-20 in
Months to full growth9
52% %
Early growth<40Mid growth40-70Late growth70-90Fully grown90+

Predicted adult weight: 19.2 lb (Medium)

  • At 12 weeks old, your medium puppy has completed about 52% of their adult growth.
  • The predicted adult weight is 19.2 lb. This range is an estimate based on breed size; individual dogs vary by up to 10-15%.
  • Expect most remaining growth over the next 9 months, with the growth rate slowing as maturity approaches.
  • Sex was not specified. Male dogs typically weigh 10-20% more than females; select a sex for a more refined estimate.

Next stepChoose a crate sized for 19 lb to avoid having to upgrade mid-growth.

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