Work Out Your Cat’s Age In Human Years: Calculator & Age Table

Cats age much faster than humans in their first couple of years.

A one-year-old cat is roughly equivalent to a 16-year-old human.

After cats have matured a slower rate of 4 cat years to every human year is a realistic scale.

Indoor cats live to an average of 15 years which is equivalent to a human age of 76.

Cat Age Calculator:

  1. Your cats age in human years is:

    1 Year
  2. Your cats age in human years is:

    3 Years
  3. Your cats age in human years is:

    5 Years
  4. Your cats age in human years is:

    7 Years
  5. Your cats age in human years is:

    9 Years
  6. Your cats age in human years is:

    11 Years
  7. Your cats age in human years is:

    16 Years
  8. Your cats age in human years is:

    20 Years
  9. Your cats age in human years is:

    24 Years
  10. Your cats age in human years is:

    28 Years
  11. Your cats age in human years is:

    32 Years
  12. Your cats age in human years is:

    36 Years
  13. Your cats age in human years is:

    40 Years
  14. Your cats age in human years is:

    44 Years
  15. Your cats age in human years is:

    48 Years
  16. Your cats age in human years is:

    52 Years
  17. Your cats age in human years is:

    56 Years
  18. Your cats age in human years is:

    60 Years
  19. Your cats age in human years is:

    64 Years
  20. Your cats age in human years is:

    68 Years
  21. Your cats age in human years is:

    72 Years
  22. Your cats age in human years is:

    76 Years
  23. Your cats age in human years is:

    80 Years
  24. Your cats age in human years is:

    84 Years
  25. Your cats age in human years is:

    88 Years
  26. Your cats age in human years is:

    92 Years
  27. Your cats age in human years is:

    96 Years
  28. Your cats age in human years is:

    100 Years
  29. Your cats age in human years is:

    104 Years
  30. Your cats age in human years is:

    108 Years
  31. Your cats age in human years is:

    112 Years
  32. Your cats age in human years is:

    116 Years
  33. Your cats age in human years is:

    120 Years
  34. Your cats age in human years is:

    124 Years
  35. Your cats age in human years is:

    128 Years
  36. Your cats age in human years is:

    132 Years
  37. Your cats age in human years is:

    136 Years
  38. Your cats age in human years is:

    140 Years
  39. Your cats age in human years is:

    144 Years
  40. Your cats age in human years is:

    148 Years
  41. Your cats age in human years is:

    152 Years
  42. Your cats age in human years is:

    156 Years
  43. Your cats age in human years is:

    160 Years
  44. Your cats age in human years is:

    164 Years
  45. Your cats age in human years is:

    168 Years

Cat Age In Human Years Conversion Table

While it is not an exact science the table below shows how cats mature at a much faster rate than humans do:

Cats AgeHuman EquivalentLife Stage
1 month1 yearKitten
2 months3 yearsKitten
3 months5 yearsKitten
4 months7 yearsKitten
5 months9 yearsKitten
6 months11 yearsKitten
12 months16 yearsYoung Adult
18 months20 yearsYoung Adult
2 years24 yearsYoung Adult
3 years28 yearsPhysical Prime
4 years32 yearsPhysical Prime
5 years36 yearsPhysical Prime
6 years40 yearsPhysical Prime
7 years44 yearsMature
8 years48 yearsMature
9 years52 yearsMature
10 years56 yearsOld
11 years60 yearsOld
12 years64 yearsOld
13 years68 yearsOld
14 years72 yearsOld
15 years76 yearsVery old
16 years80 yearsVery old
17 years84 yearsVery old
18 years88 yearsVery old
19 years92 yearsVery old
20 years96 yearsVery old
21 years100 yearsVery old
22 years104 yearsVery old
23 years108 yearsVery old
24 years112 yearsVery old
25 years116 yearsVery old
38 years*168 yearsVery old

*the oldest cat who ever lived.

Not sure how old your cat is? Read our article on how to tell a cats age.

Adopted an old cat?
Cats over the age of 10 can be very expensive to insure and it can be difficult to get comprehensive cover for them.

Read our guide to cat insurance for older cats to find a good deal.

Average Cat Life Expectancy

Cats life expectancies vary from breed to breed, things such as whether they have been neutered also impact their life expectancy.

indoor cat chilling

As a general rule mixed breed cats are often hardier and have longer than average life spans. The factor which has the biggest impact on the length of your cats life is whether it is an indoor or an outdoor cat:

  • An indoor cat can expect to live to an average of 15 years.
  • Outdoor cats live an average of 5.5 years.

Read our article on how long do cats live for more information.

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