Free Tool
How Old Is My Cat in Human Years?
Enter your cat's age below to see their approximate human-equivalent age and life stage. A quick, shareable way to understand where your cat is in life.
Human equivalent age
28years
3 years old
Life stage: Prime adult
How the math works
- Year 1 = about 15 human years
- Year 2 = about 24 human years (9 more)
- Each year after = about 4 human years
This is the commonly used simplified formula. Individual aging varies by breed, health, and lifestyle — use it as a fun estimate, not a medical assessment.