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Puppy Weight Calculator — how big will my puppy get?

Enter your puppy's current weight and age, pick a size class, and we'll project their adult weight from real growth-curve percentages.

16 wks
Fully grown, your puppy will likely weigh
26–34 lb
🐾 About 50% grown today

— projected growth curve · shaded = likely range (±12%) · ● your puppy today

The rough method: (weight ÷ weeks) × 52

A popular quick formula just takes average weekly gain so far and multiplies by 52: (15 ÷ 16) × 52 ≈ 49 lb. It's fine as a ballpark for small and medium dogs, but it's less accurate for large and giant breeds, which keep growing well past their first birthday and don't gain at a steady rate. The main calculator above uses growth-curve percentages instead, which is why the two answers can differ.

Estimates are for healthy puppies with a typical growth pattern. Genetics, nutrition, and neuter timing all shift the curve — your vet's growth-chart check is the gold standard.

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