Cat Age Calculator
Free cat age calculator with indoor/outdoor lifestyle adjustment. Outdoor cats age 10-15% faster. Search 30 cat breeds, see 6 life stages (Kitten to Geriatric), get health tips per stage, view fun stats (heartbeats, naps, purring sessions), and download a shareable pet age card.
| Cat Age | Human Equivalent |
|---|
| Your Age | Cat Age | Life Stage |
|---|
How to Use
Personalize results with your cat's name.
Select age in years and months. Choose Indoor, Both, or Outdoor — outdoor cats age faster.
Results appear instantly: human age, life timeline, health tips, fun stats, and shareable card.
Download a beautiful age card or compare with your other pets.
How Cat Years Are Calculated
Cats age 15 human years in year one, 24 by year two, then +4 per year. We also factor in lifestyle — outdoor cats age ~10-15% faster.
Indoor vs Outdoor
- Indoor: 12-18 years average
- Indoor/Outdoor: 10-14 years
- Outdoor only: 2-5 years
Life Stages
Kitten (0-1), Junior (1-2), Adult (2-6), Mature (7-10), Senior (11-14), Geriatric (15+). Each stage has different nutritional and health needs shown in our Health Guide.