Boston Terrier Growth Chart
Boston Terriers are compact, tuxedo-marked companions with a wide weight range depending on bone and muscle. They often finish growing near 10–12 months. Body shape helps interpret whether a puppy is toward the lighter or heavier end.
Boston Terrier weight by age
Typical weight ranges based on Boston Terrier adult size and standard growth curves. Individual puppies may vary.
| Age | Expected weight (low–high) |
|---|---|
| 8 weeks | 2.1–7.7 lb |
| 12 weeks | 3.3–10.1 lb |
| 16 weeks | 4.3–12.2 lb |
| 20 weeks | 5.2–14.2 lb |
| 24 weeks | 6.1–16 lb |
| 32 weeks | 7.8–19.5 lb |
| 40 weeks | 9.4–22.8 lb |
| 1 year | 10.9–25 lb |
Calculate Your Boston Terrier Puppy's Adult Weight
Enter your Boston Terrier puppy's age and current weight for an estimated adult weight range.
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Boston Terrier FAQ
How much will my Boston Terrier puppy weigh as an adult?
Enter your puppy's age and current weight in this calculator. Typical adult Boston Terrier ranges depend on sex, genetics, and whether the puppy is on a steady growth curve.
At what age is a Boston Terrier fully grown?
Most Boston Terrier dogs reach most adult weight between 10 and 18 months depending on size. Larger individuals may keep filling out slightly longer while bone and muscle finish developing.
How accurate is a Boston Terrier puppy weight chart?
Charts reflect typical trends, not guarantees. Individual puppies may finish above or below the estimated range based on parents, nutrition, and overall health.