Evidence-based dog longevity

How long will your dog live, and what can you do about it?

Lifespan data for 277 breeds, calculators built on studies of over 580,000 dogs, and senior care guides that say what the evidence supports. Start with your breed.

Mixed breed? Try the lifespan calculator by size.

Median dog lifespan
12.5 yr
584,734 UK dogs, 2024
Overweight penalty
−2.5 yr
up to, 12 breeds, 50,000 dogs
Lean-fed Labradors
+1.8 yr
14-year lifetime study
Flat-faced breeds
11.2 yr
vs 12.8 medium-muzzled

Calculators

Every formula cites its study. Nothing is stored, nothing to sign up for, and each tool can be embedded on your own site.

Breed lifespans

Typical life expectancy, senior age, the conditions that shorten each breed's life and what to do about them. All 277 breeds, or the most searched:

What the numbers say

Size sets the clock

Small breeds: 12.7-year median. Large: 11.9. The shortest-lived breeds are all giants, from the Caucasian Shepherd at 5.4 years to the St Bernard at 9.3. How long do dogs live →

Weight is the lever you hold

Overweight dogs lived 5 months to 2.5 years less across 12 breeds. Lean-fed Labradors lived 1.8 years longer and got arthritis two years later. Check body condition →

The senior years decide the rest

Senior begins in the last quarter of expected lifespan. Six-monthly exams, dental care and pain control are where healthy years are won or lost. Senior care guides →

Senior dog care

Insure before something is in the record

Pet insurance excludes anything diagnosed before enrollment. For breeds with expensive hereditary conditions, the cheapest policy is the one bought while the dog is young and healthy.

Embrace Pet Insurance

Accident and illness cover with an optional wellness rewards plan for routine care such as dental cleanings and bloodwork.

Get an Embrace quote

Lemonade Pet

App-first insurer with fast claims and add-ons for vet visit fees, dental illness, and physical therapy.

Get a Lemonade quote

Tailyears is reader-supported. Some links on this page are affiliate links: if you buy or get a quote through them we may earn a commission at no extra cost to you. This never changes what we recommend, and it never replaces advice from your veterinarian.

How Tailyears works

Breed sizes, weights and life expectancy ranges come from AKC breed data. Population lifespans come from two UK studies: VetCompass life tables (Teng 2022, 30,563 dogs) and McMillan et al. 2024 (584,734 dogs, 155 breeds). Lifestyle effects come from Salt 2019, Kealy 2002 and Hoffman 2013. Health watchlists are curated from breed club surveys and the veterinary literature for 110 breeds and size-based for the rest. Full methodology and sources.