Dogsoria wellness tool
Dog Age Calculator: Convert Dog Years to Human Years
Use this Dog Age Calculator with your dog's age or birthday and adult size to estimate their human age and life stage.
Tell us about your dog
Dog Size
How old is your dog?
Enter your dog's age to begin
Select a birthday to calculate your dog's age. If you only know an estimated age, use Current Age instead.
Equivalent to
Human Years
Enter your dog’s age to see their estimated human-age equivalent.
Life Stage Timeline
Enter age to begin
Adult
Adult
Care Tips For This Life Stage
Start with your dog's current age to see care tips for their life stage.
Dog Age to Human Years Chart by Size
Use this dog age chart for a quick comparison without entering anything into the calculator. Dogs develop very quickly during their first two years, so the relationship between dog years and human years is not linear. After age two, this chart adjusts the estimate by adult size because smaller dogs generally age more slowly later in life than larger dogs.
| Dog's Actual Age | Small (<22 lbs) | Medium (22–50 lbs) | Large (>50 lbs) |
|---|---|---|---|
| 1 year | 15 | 15 | 15 |
| 2 years | 24 | 24 | 24 |
| 3 years | 28 | 29 | 31 |
| 4 years | 32 | 34 | 37 |
| 5 years | 36 | 39 | 44 |
| 6 years | 40 | 44 | 50 |
| 7 years | 44 | 49 | 57 |
| 8 years | 48 | 54 | 63 |
| 9 years | 52 | 59 | 70 |
| 10 years | 56 | 64 | 76 |
| 11 years | 60 | 69 | 83 |
| 12 years | 64 | 74 | 89 |
| 13 years | 68 | 79 | 96 |
| 14 years | 72 | 84 | 102 |
| 15 years | 76 | 89 | 109 |
Note: These numbers are practical estimates, not measurements of biological age. Breed, genetics, health, body condition, and lifestyle can all affect how an individual dog ages.