Cat Age Chart: Cat Years to Human Years

Cat Years: How Old is Your Cat?

October 21, 2019
Cat Mother

How old is your cat in human years? See our Cat Age Chart which calculates cat years to human years, based on weight.  Are you surprised? 

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 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 and weight and other factors, but this chart gives you a general idea.

Cat Years to Human Years Converter

Cat's AgeHuman Years
years years

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

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

Of course, if a cat is adopted or a stray, you may need to use other clues to determine the age in cat years. 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!

Reader Comments

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26 years old

I have a cat we rescued at a gas station when she was about 4 weeks old ,she just turned 26 in Sept.2019, She has lost teeth,claws ,and much skin hangs down she has what I call senior moments and eats very good some days other days not so good. Vet said she had congestive heart failure 4 years ago He is shocked when ever he sees her ,says she is in good health for her age He tells her I think your going to out live us all.As i bottle feed her when she was found .I would tell her your one lucky girl And Lucky became her name she has outlived 5 dogs and 8 rescue cats.

Poor information

This is poor information. Tartar on the teeth is not an indication of age if they have a poor diet or the opposite if they are getting yearly dental care, nor are missing teeth. It's about their diet and overall health and care. Cloudy eyes? MANY conditions cause that, not just age! This kind of bad information just gives people an excuse to not get veterinary care for the cats and just assume it's age related.

cat age indicators

Hi, Bonnie. We understand your concern and have expanded that section to make things clear that, as you say, these indicators are not always ones that imply age but are instead very general guidelines. Thank you for your interest in animal welfare and in The Old Farmer’s Almanac!

Senior kitties

Have 2 furry kids..both calicos. Calli is almost 21 years old, pretty good health, noticeable arthritis but eats like a pig! I have had her since a baby! Beautiful and sweet!

Eloise is a rescue kitty pushing 12 years old. Playful and so loving! She is a rescue, abandoned twice. The last abandonment was in an apartment in Tucson, Az. She was taken by Pima County Animal Control where they discovered she was chipped so returned to the kitty no-kill shelter (PAW-sitively No Kill Cat Shelter)...where they posted her on Facebook. We fell in love and drove from Pine, AZ to Tucson to adopt her after MUCH vetting! So you understand..the ONE WAY mileage to Tucson from Pine is appx. 204 miles...remember that’s one way! Yes, we drove that far to adopt her!

I attribute their longevity to bring INDOOR ONLY kitties...lots of loving care, healthy foods!

Love dogs too...but these two girls are amazing and loved!

i lost my cat last week, miss

i lost my cat last week, miss you so much tiddles