Tool
Puppy adult-weight estimator
A rough adult weight range from your puppy's current age and weight. Useful for sizing crates, harnesses and food portions — not a prediction.
Estimated adult weight
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How this works
Puppies of different sizes grow on different curves: small breeds finish growing near a year, while giant breeds keep filling out into their second year. We divide the current weight by the typical share of adult weight reached at that age, then show a ±15% range because individual variation is large.
Where it goes wrong
- Mixed breeds can inherit either parent's growth pattern — if you're unsure, try both size groups and treat the spread as the honest answer.
- A puppy who is currently over- or under-weight will produce a skewed estimate.
- Growth is not steady week to week. One measurement is a snapshot, not a trend.
Better than a calculator
Your vet can assess body condition at routine visits and tell you whether growth is tracking healthily — which matters far more than the final number, especially for large and giant breeds where growing too fast carries joint risk.
This information is general and educational. It is not veterinary advice and cannot diagnose, treat or prevent disease. Speak to a licensed veterinarian about your dog's health.