狗狗年齡換算（人類年）

How to use

1. Enter your dog's current age in years (decimals allowed, e.g. 1.5 for 18 months).
2. Select your dog's breed size — small, medium, or large.
3. The human-equivalent age updates instantly below.

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

常見問題

Is this dog age calculator free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.

Does it work on mobile?

Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.