Dog Years To Human Years Chart
View our dog years to human years chart and quickly see how your dog’s age compares to human years for small, medium, and large breeds!
While the old “1 dog year = 7 human years” rule is easy to remember, it’s not very accurate. Dogs age at different rates depending on their size and breed. This chart gives a more realistic comparison, showing how dog years translate to human years for small, medium, and large dogs.
Dog Age to Human Years Chart
Use this chart to estimate your dog’s age in human years based on size.
| Dog Age (Years) | Small Breed | Medium Breed | Large Breed |
|---|---|---|---|
| 1 | 15 | 15 | 15 |
| 2 | 24 | 24 | 24 |
| 3 | 28 | 28 | 28 |
| 4 | 32 | 32 | 34 |
| 5 | 36 | 36 | 40 |
| 6 | 40 | 42 | 45 |
| 7 | 44 | 47 | 50 |
| 8 | 48 | 51 | 55 |
| 9 | 52 | 56 | 61 |
| 10 | 56 | 60 | 66 |
These are the most commonly used estimates and may vary slightly between sources.
How to Use This Chart
Find your dog’s age in years on the left.
Look across the row to the size category that matches your dog
That number is their estimate age in human years
These are general guidelines based on breed size. Every dog is different — factors like genetics, diet, and health can all affect aging.
Disclaimer
This chart is based on general veterinary data and lifespan averages. It’s meant to be a helpful guide, not a precise medical tool.