Cat Years to Human Years – Cat Age Calculator

Cat Years to Human Years

Do you want to know your cat age in human years? An average cat lives between 12 to 18 years old. 

Cats age much faster than humans do in their first couple years of life. While a 1-year-old human is essentially still a baby, a 1-year-old cat is comparable to a 15-year-old human in terms of physical and mental maturity.

This accelerated aging slows down after the second year, but cats continue to age faster than humans do throughout their lifespan.

Well cared for indoor cats who are kept healthy and active with a good diet, affectionate home, and routine veterinary care may reach 20 years old, with some exceptional cats living to 25 years or beyond.

Still, even living to 20 cat years is only equivalent in human years to around 96 years old. 

Also Know : – Dog Years to Human Years

How to Convert Cat Age in Human Years

How to Convert Cat Age in Human Years
How to Convert Cat Age in Human Years

Here is a step-by-step guide on how to convert your cat’s age into human years:

  1. Determine your cat’s current age in years.
  2. For the first year, multiply your cat’s age by 15 to determine how old they are in “human years”. For example, 1 cat year x 15 = 15 human years.
  3. For the second year, add 9 human years to the total from step two. For example, after 2 cat years they have aged 15 (step 2) + 9 more years, totaling 24 human years.
  4. For each year after the second, add 4 human years to the running total. For example, a 3 year old cat would be 24 (the total from step 3) + 4 more years, making them 28 human years old.
  5. Continue adding 4 more human years for each additional cat year when doing the conversion.

So your cat’s age in human years will be:

  • 1 Cat Year = 15 human years
  • 2 Cat Year = 24 human years
  • 3 Cat Year = 28 human years
  • 4 Cat Year = 32 human years

Read About : – Shih Tzu Age in Human Years

Use below given cat age calculator for cat years compared to human years.

Cat Years to Human Years Calculator


Cat Years to Human Years Calculator
Cat Years to Human Years Calculator
  • 1 Cat Year = 15 human years
  • 2 Cat Years = 24 human years
  • 3 Cat Years = 28 human years
  • 4 Cat Years = 32 human years
  • 5 Cat Years = 36 human years
  • 6 Cat Years = 40 human years
  • 7 Cat Years = 44 human years
  • 8 Cat Years = 48 human years
  • 9 Cat Years = 52 human years
  • 10 Cat Years = 56 human years
  • 11 Cat Years = 60 human years
  • 12 Cat Years = 64 human years
  • 13 Cat Years = 68 human years
  • 14 Cat Years = 72 human years
  • 15 Cat Years = 76 human years
  • 16 Cat Years = 80 human years
  • 17 Cat Years = 84 human years
  • 18 Cat Years = 88 human years
  • 19 Cat Years = 92 human years
  • 20 Cat Years = 96 human years

The Crème Puff lived for 38 cat years, based on the cat to human age conversion that would equal 172 human years. 

The longest living domestic cat on record is Crème Puff, who lived from August 3, 1967 to August 6, 2005 – an amazing 38 years and 3 days!

Crème Puff was born in Austin, Texas and lived with her owner, Jake Perry, for her entire life. She was an indoor cat who had a diet consisting primarily of dry cat food supplemented with broccoli, eggs, turkey bacon, and coffee with heavy cream. It’s likely that her diet and lack of predators living exclusively inside contributed to her exceptionally long life.

Cat Age Chart

We’ve created a Cat years to human years chart for better understandings.

Cat years to human years chart
Cat years to human years chart

In this chart:

  • Kitten is from 0-1 year old
  • Junior is from 1-2 years old
  • Young adult cat is from 2-6 years old
  • Mature adult cat is from 4-10 years old
  • Senior cat is from 7-10 years old
  • Geriatric cat is from 10-15 years old
  • Frail cat is past 15 years old

You can see the different life stages a cat goes through as it ages. This chart makes it easy to quickly translate a cat’s age into human years and see what life stage they are in. 

For example, a 5 year old cat is equivalent to a 36 year old human – middle aged! This chart can help better understand a cat’s health and care needs.

Cats spend 70 percent of the day sleeping and 15 percent grooming, so only 15 percent awake and active. Senior cats over 11 years old spend even more time napping — over 80 percent of the day.

Types of Cats

  • Siamese – Known for their distinctive coloring and vocal nature. Siamese cats tend to be active and demanding of attention.
  • Maine Coon – One of the largest domesticated breeds, with long fur coats and hardy natures. Maine Coon cats are intelligent and make affectionate pets.
  • Persian – Persians have beautiful, long flowing fur that requires regular grooming. They tend to have a quiet, calm personality.
  • Ragdoll – Known for being docile, loving and enjoy being held. Ragdolls are a large, laidback breed with semi-long fur.
  • Abyssinian – Active and energetic medium sized cats. The Abyssinian has ticked fur and loves to play. They are great companions.
  • Sphynx – A hairless breed. While they lack fur, they are not hypoallergenic as the allergen is associated with cat saliva and dander.
  • Bengal – Bengals have vivid leopard spotted or marbled coats from their wild ancestry. They are confident, energetic and intensely curious.

Siamese and Persian cats are among the most popular, but there are many breeds to choose from. The most important factors are the personality and characteristics matching your lifestyle.

Cat Life Stages

Cats go through several distinct life stages from kitten to senior cat. Here are the main cat life stages:

Kitten – 0 to 6 months

  • Very playful and energetic
  • Requires lots of attention
  • Growing quickly, high nutritional needs
  • Learning behavior and skills from mother and littermates

Junior – 7 months to 2 years

  • Remaining playful and mischievous
  • Further physical and social development
  • Establishing behavior patterns/relationships with people and animals

Prime – 3 to 6 years

  • Reached full physical maturity
  • Very active and affectionate
  • Not quite “adult” yet in interests and energy

Mature Adult Cat – 7 to 10 years

  • Beginning to calm down and less excitable
  • Settles into predictable routine and behaviors
  • Close bonds with human and feline families

Senior Cat – 11 years+

  • Much calmer and more relaxed
  • Naps frequently, moves slower
  • Higher medical needs associated with aging
  • Important to monitor diet, activity and comfort

Human lifespans differ greatly from cats, but these categories can help us understand a cat’s needs and temperament as they age from rambunctious kittens to mellow, mature felines. Recognizing the cat’s life stage will allow better care.

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