How do cats age compared to humans?

Year 1 = ~15 human years. Year 2 = ~24 human years (+9). Each year after 2 = +4 human years. A 10-year-old cat ≈ 56 human years. A 15-year-old cat ≈ 76 human years.

What are the life stages of a cat?

Kitten (0–1), Junior (1–2), Adult (3–6), Mature (7–10), Senior (11–14), Super Senior (15+). AAFP recommends more frequent vet visits for Senior and Super Senior cats.

Cat Age Calculator — Cat Years to Human Years

Quick answer: Enter your cat's age to see equivalent human years and life stage (Kitten through Super Senior).

Convert your cat's age to equivalent human years using American Association of Feline Practitioners (AAFP) guidelines. Cats age rapidly in their early years — year one equals about 15 human years.

Last reviewed: April 2026Report an error

Cat's Age (years)

Human Age Equivalent

36 years

A 5-year-old cat is roughly 36 in human years. Life stage: Adult.

Human Age

36 years

Life Stage

Adult

How to Use This Cat Age Calculator

1Enter your cat's age in years.
2Read the equivalent human age and life stage.

Frequently Asked Questions

: Year 1 = ~15 human years. Year 2 = ~24 human years (+9). Each year after 2 = +4 human years. A 10-year-old cat ≈ 56 human years. A 15-year-old cat ≈ 76 human years.
: Kitten (0–1), Junior (1–2), Adult (3–6), Mature (7–10), Senior (11–14), Super Senior (15+). AAFP recommends more frequent vet visits for Senior and Super Senior cats.

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Cat Age Calculator — Cat Years to Human Years

How to Use This Cat Age Calculator

Frequently Asked Questions

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