Calculate your dog’s age in human years
Still counting puppy weeks? Use our puppy age calculator for weeks, months, and milestones.
Puppy ages and milestones by month
Eight weeks, six months, or almost a year old? Every puppy stage brings something new. Find the guide for your little troublemaker, sweetheart, or bit of both.
Explore puppy ages from 2 to 12 months or read about puppy growth milestones.
How the dog age calculator works
Dogs grow up much faster than people do in their first years. Puppy Years estimates a one-year-old dog at about 15 human years and a two-year-old at about 24. After that, the comparison changes with size: small dogs generally age more slowly in later years than giant breeds. If your dog is a mix, choose the closest adult size.
Dog years are not just seven times your dog’s age
The seven-year rule is easy to remember, but dogs age fastest early in life. Size and breed make the later years more realistic.
| Dog age | Small dog | Medium dog | Large dog | Giant dog |
|---|---|---|---|---|
| 1 | 15 | 15 | 15 | 15 |
| 2 | 24 | 24 | 24 | 24 |
| 5 | 36 | 39 | 42 | 45 |
| 8 | 48 | 54 | 60 | 66 |
| 12 | 64 | 74 | 84 | 94 |
| 14 | 72 | 84 | 96 | 108 |
See the full dog years chart, find your dog’s age by year, or try the human years to dog years calculator.
More ways to celebrate your dog
Got a birthday coming up, or just curious about the years ahead? These are good places to go next.
Dog age calculator questions
How old is my dog in human years?
Enter your dog’s birthday and breed in the calculator. Puppy Years estimates human years by using age first, then breed size after the first two years.
Is one dog year really seven human years?
No. The seven-year rule is a simple shortcut. It does not account for the fast puppy years or the way size and breed affect aging.
How old is a 13 year old dog in human years?
A 13-year-old dog is about 68 in human years if small, 79 if medium, 90 if large, and 101 if giant using the Puppy Years estimate.
When is a dog considered senior?
Senior age depends on breed size and expected lifespan. Small dogs often reach senior status later than large and giant dogs.
Can I calculate dog years by breed?
Yes. Choose your dog’s breed in the calculator, or open a breed age guide to see a chart and life stage notes for that breed.
Can I use this for a mixed breed dog?
Yes. Choose Mixed Breed / Not Sure, then choose the closest size group. The result will use size instead of a specific breed.