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Cat Age Chart: Cat Years to Human Years | How Old Is My Cat? | The Old Farmer's Almanac

Cat Age Chart: Cat Years to Human Years

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How Old Is Your Cat in Human Years?

Cat Years to Human Years Converter

Cat's Age Human Years
years years

Enter your cat's age (from 1 to 25) in the calculator above to see the equivalent age in human years.

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How old is your cat in human years? Consult our Cat Age Chart, which converts cat years to human years. Are you surprised at your cat’s “human” age?

The old “seven year” rule is simple but not quite accurate because cats age more rapidly during the first two years of life. In a feline’s very first year, he or she reaches the human age equivalent of 15. By a feline’s second year, he or she is the equivalent of age 24. 

Cat Age Calculator: Cat Years to Human Years

If we think like a cat, here’s how a cat’s age compares to a human’s age. Of course, there are some differences in age conversion, depending on breed, weight, and other factors, but this chart gives you a general idea.

[block:catyears=catyears_conversion]

Cat Years to Human Years Chart

Cat Years

(cat’s age according to the calendar)

Human Years

(cat’s age in equivalent human years, based on stage of development/aging)

1 year 15
2 years 24
3 28
4 32
5 36
6 40
7 44
8 48
9 52
10 56
11 60
12 64
13 68
14 72
15 76
16 80
17 84
18 88
19 92
20 96
21 100
22 104
23 108
24 112
25 116

How to Figure Out Your Cat’s Age

If a cat is adopted or a stray, you may need to use other clues to estimate the age of your feline friend. Below are a few general guidelines, but these characteristics will vary between cats, depending on health, previous care, and circumstances. For best advice, consult a veterinarian.

  • A cat’s teeth: In general, the older the cat, the more stained the teeth. White teeth means that the cat is probably younger than 1 year. If there is some yellowing, the cat might be between 1 and 2 years. Tarter build-up on all the teeth may translate to age 3 to 5, but keep in mind that certain cats are more prone to tartar build-up than others; certain diets may promote tartar; and the lack of tartar may just be an indication of previous dental care. Missing teeth may mean that the cat is senior, although health issues and other causes (such as previous dental surgeries) may also result in the loss of teeth.
  • A cat’s coat: The older the cat, usually the thicker and coarser the fur. (Keep in mind that different breeds/mixes will have different coat thicknesses, and may naturally have fine or thick fur at any age.) Senior cats may have patches of white or gray.
  • A cat’s muscle tone: Younger cats are muscular and older cats often are bonier with extra skin; as they age, their shoulder bones may protrude more.
  • A cat’s eyes: Young cats have very bright, clear eyes, usually without any discharge, depending on health and breed. As the cat ages, the cat’s irises may appear jagged. A cat with eye cloudiness may indicate a senior, but there are health conditions, some of which require immediate care, that also can cause cloudiness. (If you kitty’s eyes are cloudy or watery, or if she is squinting often, consult a veterinarian as soon as possible. Certain eye conditions can get worse quickly, and cause more discomfort, if not treated soon.)

Have a dog? See our Dog Age Chart!

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