Cat age according to humans: calculations and tables

Any person understands that the development of a cat occurs according to some of its own, individual laws. These animals grow and change quite quickly, which is especially noticeable in the first year of life.

The thing is that the lifespan of a cat in nature differs significantly from that allotted to us humans. At the same time, the cat is still obliged to fulfill its main biological function: to breed and adapt to life more than one offspring.

So it turns out that one-year-old cats already have to fight protracted battles with competitors, winning territory, females and sphere of influence. By our standards, such a cat can already be considered quite old - after all, he is already ready to leave offspring.

Why do you need to know the age of cats?

Having found out how old your pet is, you can properly adjust its care, balance its diet, and better monitor its health. It is impossible not to take into account changes in years, because this will have a bad effect on the standard of living of your mustachioed friend. Why else might such knowledge be useful:

  1. Determine the level of physical activity, the intensity of which decreases with age. Excessive play with an elderly person will have a bad effect on the joints and cardiovascular system. But for younger people, lack of activity will negatively affect physical development or lead to dangerous obesity.
  2. The cat's health is monitored in accordance with physiological changes. For example, only older individuals are susceptible to cataracts. Therefore, caring for mature pets should be more thorough.
  3. The selection of diet must be correlated with the characteristics of the period of life. Nutrition must meet the needs of the body. For example, older cats find it difficult to eat dry food because their teeth have worn out and become more brittle. They are no longer adapted to rough food.

Knowing the degree of maturity, it is not difficult to help your mustachioed friend develop fully and provide him with good care and proper nutrition. The quality of life and attention of the owner will prolong the cat’s life.

Odds table

The most popular method is to use a coefficient table. This is a special number that approximately determines how many human years pass while a pet lives 1 year.

It is incorrect to compare the psychological characteristics, logic and thinking of cats and people, so scientists have created a special plate showing the ratio of cat and human ages. If the exact age is unknown, any veterinarian can determine it (by the animal’s teeth and the general condition of the body).

Periods of a pet's life

According to research by zoological scientists, the life of a mustachioed friend goes through different stages. Each of them is characterized by its own physiological, behavioral and psychological characteristics. There are 6 stages of cat age:

  1. Childhood

    lasts from birth to six months. This is a time of rapid growth, as well as formation until the onset of puberty.

  2. Youth

    – period from 6 months to 2 years. This is the stage of preparing the body for adulthood. The growth of the mustachioed friend continues, but at a reduced pace.

  3. Heyday

    – time from 2 to 7 years. This is the peak of increased physical and mental activity: the pet has a strong skeleton, healthy teeth and beautiful coat.

  4. Maturity

    – stage from 7 to 11 years. Then a slight decrease in physical activity begins, but in general the cat’s age is not so noticeable.

  5. Elderly age

    – stage from 11 to 15 years. Vitality is gradually lost. The appearance and quality of fur, claws, and teeth deteriorate. The first health problems appear.

  6. Old age

    . After 15 years, a decrease in various types of activity is clearly expressed, sleep time increases, and an increased risk of various diseases arises.

This division into stages becomes fundamental when understanding the degree of maturity of a cat. Awareness helps in proper care and maintenance. Veterinarians quite easily determine the age of a cat based on physiological data and behavioral characteristics of each period.

How castration or sterilization affects longevity

Contrary to popular belief, surgery to deprive reproductive function does not shorten, but prolongs the life of your pet. This happens thanks to:

  • softening of character (the cat stops getting into fights and looking for adventures);
  • prevention of oncology and sexually transmitted diseases;
  • absence of hormonal surges due to medications, pregnancy and childbirth.

Frequent birth and feeding of kittens greatly wears out the body. He suffers not only physically, but also emotionally. After sterilization, this problem completely disappears, as does the possibility of developing cancer. Thanks to the operation, the overall life expectancy is increased by 3 years.

The only disadvantage for castrated animals is their tendency to become obese. Due to a slower metabolism, they gain weight faster, so their diet must be strictly controlled.

Determining the number of years lived

It is difficult for an inexperienced owner to determine the age of a cat without the help of a specialist. An experienced breeder is able to accurately indicate the age of his pet, but it would be best to show the animal to a veterinarian. The specialist will not only tell you how old the cat is, but will also paint a general picture of her condition. In veterinary practice, there are several criteria for determining the age of animals.

According to the condition of the teeth

Veterinarians can easily determine the amount of time an animal has lived by looking at its teeth. This method is effective for different individuals, from kittens to old people. This fact can be explained by the fact that the schedule for replacing baby teeth with molars is quite strict. The strength of the fangs and their color are the best indicators of not only the health of the pet, but also its maturity.

Number of yearsCondition of the oral cavity
5 weeksBaby teeth erupting
6 monthsDairy products are completely replaced by permanent indigenous ones.
1 yearThe canines should be in the best condition, white and strong
1.5 yearsThe incisors on the lower jaw begin to wear off
2 yearsThe enamel becomes yellow in color and traces of deposits appear
4-5 yearsThe incisors on the lower jaw wear away very noticeably
6 yearsAbrasions on the fangs begin to appear, dark spots appear on the enamel
7 yearsThe surviving incisors are completely worn away. Fangs in poor condition
10 yearsHalf of the teeth are lost
13-15 years oldFangs fall out

Table 1. Age of cats according to dental condition


The influence of time lived on the condition of the oral cavity is very noticeable. Unfortunately, the owner rarely pays attention to this and is in no hurry to change the pet’s diet when necessary. It would be a good idea to make periodic visits to a veterinarian-dentist, who will assess the condition of the oral cavity and tell you how to prevent teeth from wearing out too early.

According to the condition of the coat

The pet's appearance helps determine a cat's age. This method of definition is the most understandable for a non-specialist. However, veterinarians do not consider this method to be unambiguous, because environmental factors and living conditions can affect the condition of the coat and skin. Good care plus a balanced diet allows you to maintain an excellent appearance even in older individuals. There are only generalized signs that help determine the degree of maturity of a pet.

Number of yearsType of coat
0-1Hair is soft and shiny. There are no signs of baldness or tangles
1-7A healthy individual has fur in excellent condition: smooth, fluffy, with a good pattern. Gray hair is completely absent
8-15The hair is dull and thin. Tangles and bald spots often appear

Table 2. Age of cats according to coat condition

This method of determination has many disadvantages. Representatives of some breeds have no hair at all or their hair is quite short and coarse. This makes it much more difficult to figure out changes over the years.

According to changes in the musculoskeletal system

Proper distribution of physical activity helps maintain energy and lightness until old age. In this regard, changes in the skeleton do not become a sign that the owner pays attention to. However, for a veterinarian, bones and muscles are the best indicator of a pet's maturity.

In mature individuals, the muscles are developed in proportion to the skeleton. After final puberty, the pet acquires the characteristic features of the breed’s exterior. In addition, a mature musculoskeletal system has a number of common features:

  • pronounced muscle relief;
  • gracefulness and ease of movement;
  • increased activity, endurance.

In older animals, after 8 years of life, the first signs of aging begin to appear. They are not too noticeable, but already create inconvenience for an active individual. The changes are clearly visible in short-haired breeds. Such manifestations include:

  1. Sunken spine, protruding shoulder blades.
  2. Lack of ease of movement. Sometimes they are given to an elderly pet with great effort.
  3. The volume of muscle tissue decreases noticeably, and the remaining muscles become decrepit.

Aging felines often suffer from thinness. If the pet has excess fat, then some criteria are noticeably smoothed out. The most obvious sign of this is difficulty moving.

According to eye condition

The eyes are not the most accurate way to determine old age, since noticeable changes only begin in older animals. Until the age of 10, the eyes of kittens and mature cats are almost no different.

An indicator of old age is the iris, which can be:

  • cloudy;
  • covered with patches;
  • with uneven, blurry edges;
  • with faded color.

An eyesore also indicates that the cat's youth has passed. A non-obvious sign is that the eye becomes very wet, but this does not happen in every older cat.

Stages of life

  • First stage: childhood. Lasts approximately six months after birth. During this time, the kitten learns about the world around it and its dangers, and constantly receives new information. For now, he walks next to his mother, who teaches him everything and protects him from dangers. At the end of the first stage of a cat's life, we have an 8-12 year old child.
  • Second stage: youth. Lasts from six months to two years. Feline puberty, period of growing up, puberty. By the age of one year, the cat is already biologically ready to give birth, but it is better to wait until two years - by this time she has acquired all the vital skills and abilities.
  • Third stage: youth. Peak of development and activity. It lasts from three to five years. The cat is playful, intelligent, inquisitive and very active. Ready to reproduce healthy offspring. If we compare this with human life, then here we are no longer a teenager, but a young man who has graduated from university and found a good job.
  • Fourth stage: maturity . From the seventh to the tenth year of life. The cat becomes cynical and indifferent in its views on the world; it worries it less. More time is spent sleeping, and the animal’s gaze itself becomes disdainful and proud. The cat is still healthy and has a lot of energy, but she no longer has much desire to waste it on stupid games.
  • Fifth stage: retirement. It is only thanks to today's veterinary advances that cats have begun to discover this magnificent stage of their lives en masse. Now they enjoy life like people of about 60-70 years old. Such animals live exclusively for themselves and for their own pleasure. They sleep, eat and look at the birds in the windows for a long time, no longer trying to catch them, no longer getting nervous.
  • Sixth stage: old age. Cats at 15-16 years old are already considered long-lived. If your pet or pet survives to this stage, you are lucky. During this period of life, they become affectionate, faithful, and require more attention, love, care and warmth.

Cat to human age ratio

Experts name three methods for comparing the life periods of people and cats. Unfortunately, none of them is considered absolutely accurate, so the age of a cat by human standards is always only approximate.

First way

The starting point is 1 year. This period is the time of puberty of the animal. This age corresponds to 16 years of age. Another milestone is 2 years, at which time the formation of the pet’s character and habits ends. This happens at 24 years old by human standards. After 3 years, the pet’s maturity is determined using the formula:

x = 24 + ((number of years – 2) * 4)

For example, your cat is 6 years old. This means you need to subtract two (you get four), multiply by four (you get 16), and then add twenty-four. It turns out that a six-year-old cat, by human standards, is exactly 40 years old.

Second way

Another method is to calculate the number of years in each of the three periods of life. This method is considered more accurate than the previous one due to the detailed nature of the calculations. The degree of maturity can be determined using the following formulas:

Number of years (z)Formula
1-5x = z * 7
6-11x = (z – 5) * 4 + 35
12-20x = (z – 11) * 3 + 59

Third way

This technique has a scientific basis and was developed by veterinarians together with zoological scientists. The basis is an indicator that takes into account the intellectual, psychological and physiological level of development, converting a cat’s age to a human age in the table.

Number of years of the catNumber of years of a person
118-19
225
332-33
435-36
540-41
643-45
746-47
850-52
955-56
1060-62
1164-65
1267-68
1370
1472-73
1575
1676-77
1778
1883
1991
20100

Table 3. Age of a cat by human standards

Despite such a detailed table, it should be remembered that an accurate comparison of two fundamentally different biological species is almost impossible. A cat's age by human standards can vary. The rate of development of human and animal organisms has few similar characteristics. Here it is worth taking into account the difference in breeds and gender differences.

Features of the cat's life cycle

A year in the life of a cat is a long and significant period. It is equivalent to approximately four to five human years. Knowing this, it is easy to understand why cats suddenly develop arthritis, lose their vision, or stop hearing well in a fairly short period of time. A popular and erroneous method, as we wrote above, is the “seven-year” method of converting cat years into human years: one cat year is not equivalent to our seven. This is due to the fact that in the first two years the cat matures faster than in the rest. So, in the first year the cat reaches the age of 15 human years, in the second - she is already a 24-year-old person. Each subsequent year is equal to approximately 4 years of ours. After some simple calculations, we get: the age of a five-year-old cat is 36 human years (see table below). It should also be taken into account that a cat who lives on the street ages much faster, perhaps even twice as fast, than a well-groomed indoor cat.

In the first year of life, a cat reaches the age of 15 human years

Is it possible to increase the lifespan of a cat?

Any owner dreams of having a furry family member to please him for as long as possible. And he has the power to do everything so that the cat lives for 15, or even 20 years. What will prolong the life of your beloved four-legged animal:

  1. Annual vaccination

    . The kitten is vaccinated in the first 2-3 months of life and then the procedure is repeated every year. This will protect both your indoor and outdoor cats from the most terrible viruses with a high fatality rate.

  2. Routine examination by a veterinarian

    . Non-pedigreed cats get sick less, so they can be shown to the veterinarian during vaccination once a year - just ask the doctor about this. Pedigree animals and animals with chronic diseases require more frequent visits to the veterinary clinic - the frequency will be determined by the veterinarian himself.

  3. Sterilization and castration

    . If you do not plan to breed kittens, be sure to sterilize your pet - this will help avoid many problems, including diseases of the genitourinary system and mental disorders.

  4. Attention to any changes in your pet's behavior

    . Has your cat started drinking a lot? Stopped sleeping in your favorite chair? Is he limping? Are there strange discharges? Even such little things require close attention from the owner. The first action in case of suspicion is to call the veterinarian, he will tell you whether you need to take the animal to the clinic or if you can watch it at home.

  5. Purity

    - the key to health. Cats groom themselves, but this is not enough to maintain hygiene. For example, long-haired breeds cannot cope with caring for a luxurious fur coat, and it must be combed regularly to prevent parasites or skin diseases. It is necessary to thoroughly rinse the cat's food and water bowls, disinfect the trays, and wash the bedding.

  6. Nutrition

    must be maintained at a high level. It is not so important what you feed your cat - the main thing is that the selected diet suits it. A young cat will benefit from both natural food and high-quality dry food. But kittens and elderly individuals require a special menu, which cannot be cheap. Therefore, before getting a cat, think about the fact that in old age, in 95% of cases, it will require greater expenses than in youth.

  7. Treat your cat like a family member

    . Consider the nature of the pet and its needs. If she doesn't tolerate loneliness well, you shouldn't leave her in the apartment all day. And on the contrary - if the kitty loves isolation, respect her personal space. There are many such points, and if you do not pay attention to the psychological state of the animal, it will constantly be sick and will not live very long.

This is not a complete list of what a loving owner can do. The most important thing is to be attentive and patient, treating your pet as a younger member of the family. Then he will live very long and happily.

Long-livers in the world of cats

You always want to believe that a pet will become a happy exception and turn into the smartest/obedient/beautiful/healthy/long-living cat in the world. And indeed, this sometimes happens - and not so rarely. But some cases are like a miracle.

Long-lived breeds

Before getting a purebred cat, it is advisable to find out what diseases it is predisposed to and how many years it lives on average. Breeds that can easily live 18-20 years include:

  • Savannahs (one of the most expensive cats);
  • Siamese cats;
  • Manx;
  • Persian cats;
  • rexes (Cornish, Devon and others);
  • Egyptian Mau;
  • Burmese;
  • Russians are blue.

Their life expectancy is due to good genetics and good health. However, this list can include the most common “breed” in the world – an ordinary yard cat. Outbred mustachios easily break records, living up to 20 years with good care and the absence of diseases.

Not a universal formula

Often, pet owners believe the adage that one year of a cat or dog's life is equal to seven years of their life. Unfortunately, this is too simplistic. A cat becomes sexually mature after about 6 months, depending on the breed. According to this formula, the kitten is 3.5 years old, which breaks the theory of 7 years of age. Instead, you'll find that it's quite varied.

First, it is important to consider your cat's age in months when she is under 1 year old. In addition, the numbers also change depending on the stage of the animal's life. Diet and health can also play a role. Keep in mind that cats' life expectancy is not necessarily the same as that of humans.

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