猫の年齢（人間換算）

How to use

1. Enter your cat's current age in years (use 0.5 for 6 months).
2. The human-equivalent age updates instantly.
3. The life stage label helps you understand your cat's development phase.

Related pet tools

• Dog Age in Human Years
• Cat Food Portion Calculator
• Pet Body Condition Score
• Pet Vaccination Schedule

よくある質問

Is this cat age calculator free?

Yes, completely free with no signup required.

Does my data leave my device?

No. All calculations happen in your browser. Nothing is sent to any server.

Does it work on mobile?

Yes. The tool is mobile-first and works on any modern browser.