All Breeds › Boston Terrier
Predict your Boston Terrier's adult weight using veterinary growth data
| Male Adult Weight | 12–25 lbs |
| Female Adult Weight | 12–25 lbs |
| Male Height | 15–17 inches |
| Female Height | 15–17 inches |
| Life Expectancy | 11–13 years |
| Size Category | small |
| AKC Group | Non-Sporting |
| Full Grown By | ~11 months (48 weeks) |
Enter your puppy's age and current weight for a personalized prediction.
Open CalculatorExpected weight at key ages based on veterinary growth data for small-sized breeds.
| Age | % Adult Weight | Male Est. | Female Est. |
|---|---|---|---|
| 8 weeks | 26% | ~5 lbs | ~5 lbs |
| 12 weeks | 39% | ~7 lbs | ~8 lbs |
| 5 months | 66% | ~13 lbs | ~13 lbs |
| 6 months | 85% | ~16 lbs | ~16 lbs |
| 8 months | 95% | ~18 lbs | ~18 lbs |
| 11 months | 100% | ~19 lbs | ~19 lbs |
| Adult | 100% | 12–25 lbs | 12–25 lbs |
Most Boston Terriers reach their adult weight by around 11 months (48 weeks).
As a small-sized breed, your Boston Terrier reaches adult size by 10-12 months. Smaller breeds tend to reach full size faster than larger breeds.
Individual dogs may reach full size slightly earlier or later. Spayed or neutered puppies may also have slightly different growth timelines. Regular vet checkups are the best way to track your Boston Terrier's progress.
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Because Boston Terriers are a small-sized breed, look for a small breed puppy food designed for their growth needs. Smaller kibble, higher calorie density.
Feed puppy-specific food until your Boston Terrier reaches adult size (around 11 months), then transition to an adult formula over 7–10 days.
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For a small-sized breed like the Boston Terrier, a 24-inch crate (fits dogs up to ~25 lbs) is the right adult size. Buy the adult size from the start and use the included divider panel while your puppy is still growing.