Cat age calculator
Cat years to human years, with life stage
Age chart
| Cat | Human | Cat | Human |
|---|---|---|---|
| 1 mo | 1 | 6 y | 40 |
| 3 mo | 4 | 8 y | 48 |
| 6 mo | 10 | 10 y | 56 |
| 1 y | 15 | 12 y | 64 |
| 2 y | 24 | 15 y | 76 |
| 4 y | 32 | 18 y | 88 |
Based on the widely used International Cat Care chart. Life stages follow AAFP/AAHA 2021 (kitten under 1 · young adult 1–6 · mature 7–10 · senior 10+).
Questions
How old is a 1-year-old cat in human years?
About 15. Cats mature fast in the first year; at 2 they are around 24, then add about 4 a year.
When is a cat a senior?
From 10 (AAFP/AAHA 2021). Ages 7–10 are mature adults, when yearly blood tests for kidney and thyroid values become common.
Estimates for healthy-weight cats based on NRC 2006 and IRIS guidance. A cat with a medical condition may need different numbers.