Dog years
59 in dog years
If you are 59, you are at about the same stage of life as a dog of 8 years to 11 years, depending on the dog's size. For a cat it is about 10½ years.
59 human years, for a medium dog
10 years
A dog that age is a senior. Size changes the answer because big dogs age faster.
Try another age →| Pet | Same stage of life as 59 |
|---|---|
| Small, under 20 lb dog | 11 years |
| Medium, 20–50 lb dog | 10 years |
| Large, 50–90 lb dog | 9 years |
| Giant, over 90 lb dog | 8 years |
| Cat | 10½ years |
Why it is not 59 divided by 7
The seven-year rule would put 59 human years at a dog of about 8½ years. It is a tidy sum and it is wrong, because dogs do not age at a steady rate. A dog reaches the equivalent of about 15 in its first year and about 24 in its second, then adds four to six human years for each year after that.
The bigger the dog, the faster that later stretch goes, which is why the table gives a different answer for each size. Cats follow a similar curve: about 15, then 25, then four human years a year.
These are averages that describe a stage of life, not a health check. To go the other way, from your pet's age to human years by breed, use the pet age calculator.
Other ages
In human years.