Dog Age
Calculator
Dog years to human years.
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Pets
Puppy Weight Calculator
Enter your puppy’s current weight and age to estimate how big it will get.
Estimated adult weight
—
What your puppy may reach.
| In kilograms | — |
|---|---|
| Current weight | — |
| Growth so far | — |
| Still to gain | — |
Show our math
Enter your figures above to see the step-by-step working.
A friendly estimate — ask your vetEverything computed client-side — nothing leaves this page
How the Puppy Weight Calculator Works
A puppy’s growth is fairly steady through the fast-growing months, so a simple and widely used estimate scales its current weight up to one year: adult weight ≈ current weight ÷ current age in weeks × 52. Enter a weight taken between about 8 and 26 weeks for the most reliable figure — that’s the window where the estimate tracks best.
Breed size matters. Small and medium dogs finish growing around 9–12 months, so the estimate is close. Large and giant breeds keep filling out until 18–24 months, so treat the result as a lower bound for them. Your vet’s growth charts, tailored to breed, are the gold standard.
adult weight ≈ current weight ÷ age in weeks × 52
Note: a friendly estimate based on common averages. Breeds vary widely — your veterinarian knows your pet best.
Frequently Asked Questions
How big will my puppy get?
A common estimate scales the current weight to one year: current weight ÷ age in weeks × 52. A 10 lb puppy at 16 weeks projects to about 32 lb as an adult. Breed and size shift the real figure.
When is a puppy weight estimate most accurate?
Between roughly 8 and 26 weeks. Very young puppies and those close to adulthood give less reliable projections, and large breeds keep growing past a year.
Do big breeds keep growing after a year?
Yes. Large and giant breeds often reach full size at 18–24 months, so for them this estimate is best read as a minimum.
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