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Boston Terrier Weight Chart

How big do Boston Terriers get? See their growth chart and ideal weight.

Adult Weight Range
10-25 lbs
Size: Small

Boston Terrier Growth Chart

8 weeks
2.1 lbs
12%
3 months
5.3 lbs
30%
6 months
10.5 lbs
60%
9 months
14.0 lbs
80%
12 months
15.8 lbs
90%
18-24 months
17.5 lbs
100%

Is My Boston Terrier a Healthy Weight?

A healthy Boston Terrier should have a visible waist when viewed from above, and you should be able to feel (but not see) their ribs.

  • Ideal: Ribs easily felt, visible waist, tucked abdomen
  • !Overweight: Ribs hard to feel, no waist visible, rounded belly
  • Underweight: Ribs, spine visible, prominent waist

Frequently Asked Questions

How big does a Boston Terrier get?

A healthy adult Boston Terrier typically weighs between 10-25 lbs. They are considered a Small breed.

When does a Boston Terrier stop growing?

Most Boston Terriers reach their full adult height and weight by 18-24 months. However, they may continue to "fill out" with muscle for a few months after.

How much should a Boston Terrier puppy weigh at 3 months?

At 3 months old, a typical Boston Terrier puppy weighs approximately 5.3 lbs. Growth rates vary, so consult your vet if concerned.

How can I tell if my Boston Terrier is overweight?

A healthy Boston Terrier should have a visible waist when viewed from above, and you should be able to feel (but not see) their ribs through a thin layer of fat. If the waist isn't visible, ribs are hard to feel, or the belly sags, your Boston Terrier may be overweight. Consult your vet for an accurate body condition assessment.