Important Warning

This tool is for informational purposes only and does not provide definitive results. For professional advice or accurate calculations, please consult the relevant expert (veterinarian, agricultural engineer, etc.).

Enter cat age to quickly find in table

Cat Age - Human Age Comparison Table

What is the 15-9-4 Rule?

The 15-9-4 rule used for cat age calculation:

  • First year: 15 human years
  • Second year: +9 human years (total 24)
  • Each subsequent year: +4 human years

How to Use Cat Age Calculation Table?

With this table, you can quickly convert your cat's age to human years. The table includes cat age, human age equivalent, life stage and care recommendations.

Steps to Use the Table

  1. Enter your cat's age in the search box above
  2. Find the row corresponding to your cat's age in the table
  3. Learn the human age equivalent and life stage
  4. Read and apply the care recommendations

Cat Age Calculation Formula

Cat age calculation formula:

Human Age = (Cat Age ≤ 1) ? 15 : (Cat Age = 2) ? 24 : 24 + (Cat Age - 2) × 4