Use this Japanese Terrier puppy weight calculator to predict how big your puppy will get. Japanese Terriers are a terrier breed that typically reach full size by around 12 months.
Enter your puppy's current weight and age to predict their adult size
Estimates based on breed growth curves. Individual dogs vary with genetics and nutrition — check with your vet for a personalized read.
Indoor/outdoor enclosure — a good fit for toy and small breeds.
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| Age | Weight |
|---|---|
| Birth | 0.2 to 0.4 lbs |
| 2 Months | 3 to 4 lbs |
| 3 Months | 4 to 5 lbs |
| 4 Months | 5 to 6 lbs |
| 5 Months | 6 to 7 lbs |
| 6 Months | 7 to 8 lbs |
| 7 Months | 8 to 10 lbs |
| 9 Months | 9 to 11 lbs |
| 10 Months | 10 to 12 lbs |
| 1 Year | 10 to 12 lbs |
| 1.5 Years | 10 to 12 lbs |
| 2 Years | 10 to 12 lbs |
Estimated from typical toy-breed growth curves and the Japanese Terrier's adult weight range. Individual puppies vary — use the calculator above for a prediction based on your puppy's actual current weight.
New breed data, growth tips, and puppy-parenting insights, plus our free printable puppy growth tracker.
Generally a healthy breed with few widely-documented predispositions.
A quality small-breed diet in measured portions.
The short coat needs minimal brushing — genuinely low-maintenance.
Intelligent and trainable, though genuinely independent like most terriers — consistent, engaging training works well.
A small Japanese breed developed from Smooth Fox Terriers crossed with local dogs, historically used as a companion and small-game hunter.
Alert and lively, Japanese Terriers combine genuine terrier spirit with a compact, easy-care build.
