Dog Years Hub
Dog Age by Year
How old is your dog in human years by year?
Dog age by year is for the questions people ask when they already know the birthday age: how old is a 13 year old dog in human years, is a 14 year old dog old, or what does a 10 year old dog mean in dog years?
Use this hub to jump to the exact year, compare small, medium, large, and giant dogs, and connect the answer back to the dog years chart, senior dog calculator, and birthday pages.
Choose your dog’s age
Jump straight to the age page that matches your dog.
Dog age by year chart
This chart gives a quick comparison before you open a specific year page. The individual age pages go deeper with life stage notes, birthday ideas, and links for senior dogs or breed pages.
Small dogs usually have the lowest later-life estimate, while giant dogs often have the highest. That is why the same calendar age can feel very different from dog to dog.
| Dog age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 1 year old dog | 15 | 15 | 15 | 15 |
| 2 year old dog | 24 | 24 | 24 | 24 |
| 3 year old dog | 28 | 29 | 30 | 31 |
| 4 year old dog | 32 | 34 | 36 | 38 |
| 5 year old dog | 36 | 39 | 42 | 45 |
| 6 year old dog | 40 | 44 | 48 | 52 |
| 7 year old dog | 44 | 49 | 54 | 59 |
| 8 year old dog | 48 | 54 | 60 | 66 |
| 9 year old dog | 52 | 59 | 66 | 73 |
| 10 year old dog | 56 | 64 | 72 | 80 |
| 11 year old dog | 60 | 69 | 78 | 87 |
| 12 year old dog | 64 | 74 | 84 | 94 |
| 13 year old dog | 68 | 79 | 90 | 101 |
| 14 year old dog | 72 | 84 | 96 | 108 |
| 15 year old dog | 76 | 89 | 102 | 115 |
| 16 year old dog | 80 | 94 | 108 | 122 |
| 17 year old dog | 84 | 99 | 114 | 129 |
| 18 year old dog | 88 | 104 | 120 | 136 |
| 19 year old dog | 92 | 109 | 126 | 143 |
| 20 year old dog | 96 | 114 | 132 | 150 |
Popular dog age questions
Many dog owners search for very specific ages, especially once a dog reaches the senior years. These pages answer those searches directly while still pointing readers to the broader dog years chart.
How to use dog age by year pages
The year pages work best when you want a quick answer for a dog’s whole-number age. The main calculator is better when you know the exact birthday and want months, days, next birthday, half birthday, and birthday facts.
For mixed breed dogs, use the size group that best matches the adult dog. For breed-specific context, follow the links to the breed age guides.
Frequently asked questions
What is dog age by year?
Dog age by year means choosing the dog’s whole-number age, such as 8, 10, or 13, then comparing the human-age estimate by size group.
Should I use the dog age by year page or the calculator?
Use the dog age by year pages for a quick answer by age. Use the calculator when you know the birthday and want an exact result with months, days, and birthday facts.
Why are there different answers for small and giant dogs?
Different size groups often move through adult and senior life stages at different speeds, so Puppy Years uses a different yearly estimate after age two.