Puppy Weight Calculator

It takes the puppy's average growth so far, current weight divided by age in weeks, and projects that rate across a full 52 week year. So adult weight is roughly current weight divided by age in weeks, times 52.

It is a rough ballpark. Real puppy growth is not linear, so the linear projection is best near the middle of the growth period and tends to overshoot for large breeds. Use it as a guide, not a promise.

A lot. Toy and small breeds finish growing by about 8 to 12 months, while large and giant breeds keep growing for 18 to 24 months. The simple projection does not know the breed, so adjust expectations for very small or very large dogs.

Estimates around 14 to 20 weeks tend to track adult size better than very early ones, since newborn and very young weights swing widely. Re-check the number as your puppy grows.

Steady, gradual gain with a visible waist and easily felt ribs is the goal. If growth looks too fast or too slow, or your puppy seems over or underweight, consult your veterinarian about diet and body condition.