Cat Years to Human Years

Ever wondered how old is your cat is in human calendar years? as you may aware cats are ageing faster than us and  NO – seven years is not equal to one cat Year.

Cat Age Calculator

cat years calculator happy birthday cats

How good are you at converting cat years to human years?

Give this one a whirl:

Q:  A cat is 10 years old, how old is this in human years?

  1. 50
  2. 56
  3. 70
  4. 88

The answer…ta dah…is 56 years. How many of you got caught out by the ‘one cat year equals seven human years’ formula?

Actually, converting cat years to human years is anything but straightforward. For example, if a 10-year old cat lives exclusively outdoors, their human-equivalent age becomes 88 rather than 56. This is a great illustration of just one of the many factors that impact a cat’s life expectancy.

How to Calculate Cat Years to Human Years

  • First two years of the Cat = 25 years of a human
  • Then every year of human is equal to 4 Cat Years. However, this depends on how active your Cat is, and use our cat years calculator to convert their age. This calculator will give you a rough estimate of cats’ age to human years.

That old chestnut about one cat year being the equivalent of seven human years is just plain wrong. For example, a six-month-old human is a babe in arms, whilst a six-month-old cat can look after themselves and have kittens of their own. Converting cat years to human years is complex because our feline friends age rapidly in their first couple of years and then slow up.

But more important is knowing your cat’s life stage. This matters because the organs work differently as the body ages. When you adjust their diet to put a minimum strain on their kidneys, this helps extend the average lifespan of a cat.

Cat Years Chart

Cat years in Human years table

Age of cat (years) Human years
6 month Kitten 10
1 15
2 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

World oldest cat ever

Creme Puff was born in August 1967 and lived until August 2005 in Texas USA (38 Years)

As humans, we love anthropomorphizing cats. However, giving human years to our cats is not as whimsical as it sounds at first. In fact, it is quite helpful. Knowing our cats’ age in the calendar or human years helps us determine their life stage and therefore understand their needs and provide life-stage specific care.

How to tell Cat age by teeth

If you just bought a meow home, You might be wondering how old is my cat? The most trusted and objective way of determining a cat’s age is by examining its teeth. Knowing a few anatomy facts is a good starting point.

  • A kitten that is 2 to 4 weeks old will have its baby incisors coming in.
  • A kitten that is 3 to 4 weeks old will have its baby canines coming in.
  • A kitten that is 4 to 6 weeks old begins growing its baby premolars on the lower jaw.
  • A kitten that is 8 weeks old has all of its baby teeth fully grown.
  • A kitten that is 4 months old begins growing its permanent incisors.
  • A kitten that is 5 to 7 months old has all of its permanent teeth fully grown.
  • A cat that is 1 year old has clean and pearly white teeth. There should be no signs of plaque formation and tartar buildup.
  • A cat that is 2 years old may have a dull yellow teeth discolouration.
  • A cat that is 3 to 6 years old has slightly worn out teeth. There may be signs of plaque buildup and tartar formation.
  • A cat that is 10 to 15 years old will have missing teeth, signs of gum disease, bad breath and moderate to severe plaque buildup on the remaining teeth.