Calculate your cat's age in human years. Free online cat age converter using the standard formula: first 2 years = 25, then +4 per year.
The cat age calculator converts your cat's age to human-equivalent years using a widely accepted formula. Cats mature rapidly in their first two years, reaching the equivalent of 25 human years by age 2. After that, each cat year equals approximately 4 human years.
Year 1 = 15 human years
Year 2 = +10 human years (total: 25)
Each subsequent year = +4 human yearsLike dogs, cats age rapidly in their first year (equivalent to a 15-year-old human). The second year adds another 10 years (totaling 25). After that, aging slows to roughly 4 human years per cat year. This formula is more accurate than the old "multiply by 7" rule.
| Input | Output |
|---|---|
| 3-year-old cat | 29 human years (Prime) |
| 7-year-old cat | 45 human years (Prime) |
| 15-year-old cat | 77 human years (Senior) |