11 years in dog years is about 65 human years
An 11-year-old dog is about 65 in human years if it is medium-sized (21 to 50 lb), on AVMA’s chart. A small dog of the same age is about 60, a large one 73.5 and a giant one 91.5. The DNA clock of a 2020 study gives 69.4.
11 years in human years, by size
| Size | Human years | Life stage (AAHA) | Senior from (VCA) |
|---|---|---|---|
| Small (20 lb or less) | 60 | Senior | 11 years |
| Medium (21 to 50 lb) | 65 | Senior | 10 years |
| Large (51 to 100 lb) | 73.5 | Senior | 8 years |
| Giant (over 100 lb) | 91.5 | Senior | 7 years |
Dog age calculator, with 11 years filled in: change the size, or work a human age back to dog years.
Every size is a senior
VCA puts small dogs among the seniors at 11 to 12, the last of the four sizes; this page counts them from 11. From this birthday on, every size is a senior.
AAHA’s senior stage is not an age but the last 25% of a dog’s expected life span, which the veterinary team estimates, generally from the breed.
What changes from 10 to 11
This birthday adds 4 for a small dog, 5 for a medium dog, 5.5 for a large dog and 7.5 for a giant dog in human years on the chart. The DNA clock adds 1.5.
Life stage at 11
Dogs of every size are seniors at 11, by the stages of the 2019 AAHA guidelines and the senior ages of VCA (small 11, medium 10, large 8, giant 7).
Small dogs turn senior at 11.
What the DNA clock says about an 11-year-old dog
Wang et al. (Cell Systems, 2020) matched the DNA methylation of 104 Labrador retrievers with that of people and fitted human age = 16 × ln(dog age) + 31. For 11 years that is 69.4 human years, 4.4 more than the 65 of AVMA’s chart for a medium dog.
At 11, the chart reads older than the clock for large and giant dogs and younger for small and medium dogs: the clock slows down with age while the bigger sizes keep a steep line.
The seven-year rule at this age
Seven times 11 is 77. The chart puts an 11-year-old dog between 60 and 91.5 human years by size, and the medium dog at 65, so the rule is 12 human years too high for a medium dog. No veterinary source on this page uses it.
Frequently asked questions
How old is an 11-year-old dog in human years?
About 60 for a small dog (20 lb or less), 65 for a medium dog (21 to 50 lb), 73.5 for a large dog (51 to 100 lb) and 91.5 for a giant dog (over 100 lb), on the charts of AVMA, Merck and PetMD. Your veterinarian can tell you where your own dog is.
Is an 11-year-old dog a senior?
Yes, whatever its size: VCA counts dogs as seniors from 7 (giant) to 11 or 12 (small). AAHA defines a senior as a dog in the last 25% of its expected life and suggests exams at least every six months.
Other ages in dog years
Dog age chart: every age and size in one table · Dog age calculator
Sources
- AVMA, Pets age faster than people (chart for a medium-sized dog of 21 to 50 lb)
- Merck Veterinary Manual, Description of Dogs (Antinoff, reviewed October 2026), Dog years versus human years
- PetMD, How Old Is My Dog in Human Years? (Coates, DVM, December 2024)
- Wang T, et al. Quantitative Translation of Dog-to-Human Aging by Conserved Remodeling of the DNA Methylome. Cell Systems 2020;11(2):176–185
- The same study, free full text on PubMed Central (PMC7484147)
- 2019 AAHA Canine Life Stage Guidelines (Creevy et al., JAAHA 2019;55:267–290), Table 1
- VCA Animal Hospitals, How Old is Old? Comparing Dog Age to Human Age (Weir, Llera, Buzhardt)