Free tool, real vet math
Cat Age Calculator
This free cat age calculator converts your cat’s age to human years: year one counts for about 15, year two adds 9, and every year after adds about 4. Which means your cat has probably outranked you for a while now. Add a photo and get a card worth sharing.
Cat years to human years chart
| Cat age | Human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 3 years | 28 |
| 4 years | 32 |
| 5 years | 36 |
| 6 years | 40 |
| 8 years | 48 |
| 10 years | 56 |
| 12 years | 64 |
| 14 years | 72 |
| 16 years | 80 |
| 18 years | 88 |
| 20 years | 96 |
Cat age questions, answered
How do you convert cat years to human years?
The feline life-stage guidance used by veterinary associations puts a cat’s first year at roughly 15 human years and the second at about 9 more, so a 2-year-old cat is around 24. After that, each cat year adds about 4 human years. A 10-year-old cat is therefore around 56 in human terms.
Do indoor and outdoor cats age differently?
The conversion math is the same, but indoor cats typically live significantly longer. Many indoor cats reach their late teens, and 20-year-old cats (around 96 in human years) are not rare.
When is a cat considered a senior?
Veterinary guidance generally calls cats senior from about age 10. Senior cats have opinions, routines, and faces full of character, which happens to make them extraordinary portrait subjects.
Is this calculator really free?
Completely. No account, no email, and the photo you add to the card never leaves your device. We make custom pet portraits for a living and this is our gift to cat people.
Put this calculator on your site
Bloggers, vets, rescues, cat cafes: embed it free. Copy, paste, done.
<iframe src="https://www.petpicportraits.com/embed/cat-age-calculator" id="ppp-cat-age-calculator" width="100%" height="900" style="border:0;border-radius:12px" title="Cat Age Calculator" loading="lazy"></iframe>
<script>window.addEventListener("message",function(e){if(e.origin==="https://www.petpicportraits.com"&&e.data&&e.data.pppEmbed==="cat-age-calculator"){var f=document.getElementById("ppp-cat-age-calculator");if(f)f.style.height=e.data.height+"px"}});</script>
<p style="font-size:14px"><a href="https://www.petpicportraits.com/cat-age-calculator">Cat age calculator</a> by <a href="https://www.petpicportraits.com">Pet Pic Portraits</a></p>That photo deserves more than a card
Turn it into a custom portrait: free preview in about 30 seconds, hand-reviewed by a real person, and nothing prints without your approval.
See your cat as art (free preview)More free tools: the kitten age calculator, the cat pregnancy calculator, and the dog age calculator. Or see all free pet calculators.