Boston Terrier Age Calculator
Convert your Boston Terrier's age to human years, adjusted for small-breed aging. Life expectancy 11–13 years.
Last reviewed July 2026 · Free · Nothing you enter is stored
small breed
—
Educational estimate for a small breed. Individual dogs vary — your vet is the best judge of your Boston Terrier's life stage.
Advertisement
About Boston Terrier aging
The Boston Terrier is a small breed with a typical adult weight of 12–25 lbs and a life expectancy of 11–13 years. Because aging speed tracks body size, this page uses the small-breed rate — the slowest, which is why small dogs often reach 15+.
Frequently asked questions
How do you calculate a Boston Terrier's age in human years?
As a small breed, the Boston Terrier ages at the small-breed rate: about 15 human years in year one, 24 by age two, then roughly 4 human years for each dog year after that. Enter an age above to see the exact figure alongside the UCSD epigenetic estimate.
How long do Boston Terriers live?
The typical Boston Terrier life expectancy is 11–13 years. Keeping your dog at a healthy weight, staying current on veterinary care, and dental hygiene are the biggest levers on the high end of that range.
When is a Boston Terrier considered a senior?
Smaller breeds like the Boston Terrier typically enter their senior years around age 8–10. Senior care means more frequent vet checks and often a diet adjustment.
Advertisement