DogYearsDog lifespan by breed
Typical lifespan ranges for common breeds, grouped by size. The pattern is unmistakable: smaller dogs usually live longer — which is precisely why the age calculator charges large dogs more human years per year.
| Breed | Size | Typical lifespan |
|---|---|---|
| Chihuahua | Small (under 20 lb) | 14-16 years |
| Dachshund | Small (under 20 lb) | 12-16 years |
| Pomeranian | Small (under 20 lb) | 12-16 years |
| Yorkshire Terrier | Small (under 20 lb) | 11-15 years |
| Shih Tzu | Small (under 20 lb) | 10-18 years |
| French Bulldog | Medium (21-50 lb) | 10-12 years |
| Beagle | Medium (21-50 lb) | 12-15 years |
| Border Collie | Medium (21-50 lb) | 12-15 years |
| Australian Shepherd | Medium (21-50 lb) | 12-15 years |
| English Bulldog | Medium (21-50 lb) | 8-10 years |
| Standard Poodle | Large (51-90 lb) | 12-15 years |
| Labrador Retriever | Large (51-90 lb) | 11-13 years |
| Golden Retriever | Large (51-90 lb) | 10-12 years |
| German Shepherd | Large (51-90 lb) | 9-13 years |
| Boxer | Large (51-90 lb) | 10-12 years |
| Rottweiler | Large (51-90 lb) | 8-10 years |
| Bernese Mountain Dog | Giant (over 90 lb) | 7-10 years |
| Great Dane | Giant (over 90 lb) | 7-10 years |
How to read “typical range”. These spans describe where the middle of each breed's population tends to land, gathered from commonly published veterinary and kennel-club figures. They are not maximums — individuals outlive them regularly — and not minimums either. “Typical ranges vary” is not a disclaimer ritual here; it is the most important fact on the page.
The size gradient is the story. The smallest breeds cluster around 12–16+ years; the giant breeds around 7–10. That near-twofold difference between dogs of the same species is one of the most striking patterns in animal ageing research, and it is the reason a single “dog years” number for all dogs would be meaningless.
What owners can actually influence. Within any range, the levers with the best evidence are boring ones: keeping a dog lean, dental care, regular veterinary check-ups (twice yearly once senior — see senior ages by size), appropriate exercise, and not delaying attention to lumps, limps and appetite changes. Breed sets the rough envelope; care and luck decide where inside it a dog lands.
Lifespan questions
What dog breed lives the longest?
Small breeds dominate the longevity tables — Chihuahuas, Dachshunds, Shih Tzus and similar small dogs commonly reach 14–16 years or beyond, and individual small dogs occasionally pass 20. The ranges on this page are typical spans, not records and not guarantees.
Why do large dogs live shorter lives?
The honest summary is that it is still an active research question, but the pattern is consistent: bigger bodies grow faster, reach old age sooner by every measure we have, and show higher rates of some cancers and joint disease. Within most breeds, heavier individuals also tend to live slightly shorter lives than lighter ones.
Is a breed lifespan range a promise for my dog?
No. Typical ranges describe populations. Individual lifespan varies with genetics, weight, diet, exercise, dental care, neutering status, environment and plain luck. Use the ranges for expectations and planning — for your own dog, your vet's assessment matters more than any table.