is cat years the same as dog years

Not only do cats and dogs age differently than humans, they also age differently from one another. Factors such as the breed and size determine the speed at which an animal ages. Broadly speaking, larger pets tend to have a shorter life span than smaller pets.

Our Dog and Cat Age Calculator

We’ve made this Cat to assist you in figuring out how old your pet is in relation to you. This pet age chart will assist you in making knowledgeable decisions about your pet’s care and health by helping you better understand how they age.


Weight (lb)


Weight (lb)

Age (years) 0-20 0-20 20-50 50-90 >90
1 7 7 7 8 9
2 13 13 14 16 18
3 20 20 21 24 26
4 26 26 27 31 34
5 33 33 34 38 41
6 40 40 42 45 49
7 44 44 47 50 56
8 48 48 51 55 64
9 52 52 56 61 71
10 56 56 60 66 78
11 60 60 65 72 86
12 64 64 69 77 93
13 68 68 74 82 101
14 72 72 78 88 108
15 76 76 83 93 115
16 80 80 87 99 123
17 84 84 92 104 131
18 88 88 96 109 139
19 92 92 101 115
20 96 96 105 120

Table courtesy of Fred L. Metzger, DVM, DABVP

Why does the age of our pets matter? We must remember that as they get older, we must adjust their diet, exercise routines, and even sleep schedules to keep them happy and healthy.

Compared to humans, dogs and cats age more quickly and have substantially shorter lifespans. Although most people are aware of the notion of “dog years,” most do not know the exact techniques used by veterinarians and other professionals in the pet health industry to determine the relative age and weight of our cherished animals.

As pets get older, they also become more susceptible to illness and, consequently, are more likely to experience common ailments related to their breed and species. Therefore, as a responsible pet owner, it is easier to prevent and spot signs of decline before they get serious when you are aware of the breed and age of your dog or cat.

The majority of us are familiar with certain formulas that can be used to convert the age of our favorite animal to that of a human. Most of these formulas are linear conversions, and the most well-known one says that a human year is equivalent to seven years for a dog or cat. It turns out that this isn’t the case, and that people age differently from dogs and cats.

The primary issue with these calculations arises during the first year of life, when the development of smaller animals such as dogs and cats surpasses that of humans, even after taking into consideration their reduced lifespan. According to the original seven-year rule, a one-year-old dog or cat is equivalent to a seven-year-old human. A one-year-old dog is actually equal to a 31-year-old human, while a one-year-old cat is equal to a 16-year-old human. 6-year-old human. Remarkably, the old seven-year rule is not too far off because as dogs age, their aging process slows down and approaches the original seven-year rule result. The 1950s saw the introduction of the original seven-year rule, and it was not until recently that new research led to the development of new formulas.

These kinds of studies do more than just refute the seven-year rule or provide an accurate estimate of the human age equivalent of your beloved pet. When you discuss the oldest dog or cat, these studies provide some fascinating information. The oldest cat ever lived to 34, which is 155. The oldest dog lived to be 29 years and 5 months old, or 85 years in dog years, while the oldest cat was 64 years old. The dog study reflects our recent advances in genetic technology. The dog study guides veterinarians’ treatment decisions and helps us create a new epigenetic clock for dog cells to measure their age. Additionally, these new findings represent a breakthrough in our knowledge of how various species age. These kinds of findings advance our knowledge of the fundamental causes of aging and may one day enable us to slow down the aging process in humans.

True cat age was found in a study published in 2017 by iMedPub Journals, while true dog age was discovered in a study published in 2020 by Cell Systems. Unfortunately, these equations aren’t as simple as the seven-year rule with the new equation for cat age being

What is a ‘Pet Year’?

Dogs and cats age more rapidly than humans. We’ve all heard the term “dog years” at some point, but most of us don’t know how veterinarians and other professionals in the pet health industry determine the relative age and weight of our animals.

Pet owners can use the Pets Plus Us age calculator to find the equivalent age of their furry friends in human years, which is a very useful tool. This chart gives pet owners a clear understanding of their pets’ aging process, enabling them to make better decisions about their health and care. The age calculator helps those in the pet health industry by providing information on the average age and weight of pets, ultimately enhancing the health and lifespan of our cherished animal companions.

One human year is roughly equivalent to six or seven cat years for cats.

It’s a little more difficult for dogs because size and weight also matter. In general, dogs age more quickly the larger and heavier they are.


Do cats age 7 years like dogs?

Like dogs, cats age rapidly during their first two years of life. A cat reaches the approximate human age of 15 during its first year, then 24 at age two. Each year after, it ages approximately four “cat years” for every calendar year. This means that a five-year-old feline would be approximately 36 in cat years.

How old is 7 in cat years?

Cat Years (cat’s age according to the calendar)
Human Years (cat’s age in equivalent human years, based on the stage of development/aging)

How old is a 10 year old cat in human years?

Age of Cat
Indoor Cat: Equivalent Human Age (Years)
Outdoor Cat: Equivalent Human Age (Years)
6 years
8 years
10 years
12 years

Do cats follow dog years?

So, cat years vs. dog years – are they the same? In short, no. With that being said, both cats and dogs age differently based on their breeds, size, and general health.