# Cat Age Calculator

> Convert your cat's age to human years equivalent.

Page: https://askcalculators.com/pets/cat-age/
Definition: https://askcalculators.com/pets/cat-age/definition.json
JSON Schema: https://askcalculators.com/pets/cat-age/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/pets/cat-age/?age=1

## Inputs
- age: Age (years); type=number; optional; default=1

## Outputs
- result: Result; format=text; primary

## Formula
Human-age estimate assigns about 15 years to year one, 9 more to year two, then about 4 per later year.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Species, breed, genetics, and health cause wide variation; this is a general comparison only.