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Pet Age Calculator
Enter your cat or dog's age to see the equivalent human age and growth stage. Dogs are split by size (small, medium, large). For fun — not veterinary advice.
100% Private & Secure
This tool runs in your browser.
Your data is never uploaded or stored.
You can enter just years, just months, or both
Age Conversion Reference Table
| Cat Age | Human Age | Stage |
|---|---|---|
| 6 months | ~10 years | Puppy / Kitten |
| 1 year | 15 years | Puppy / Kitten |
| 2 years | 24 years | Junior |
| 5 years | 36 years | Adult |
| 8 years | 48 years | Mature |
| 11 years | 60 years | Senior |
| 15 years | 76 years | Senior |
Age conversion results are for general reference only. Actual aging varies by breed, health, and other factors. Consult a veterinarian for specific health concerns.
How to use
- 1
Select pet type (cat or dog).
- 2
If dog, select size category.
- 3
Enter age and see the human equivalent.
Why use this tool?
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Fast, instant results — no waiting, no page reloads.
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Clean, focused interface designed for developers.
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100% private — everything runs in your browser, nothing is uploaded to any server.
Frequently Asked Questions
How accurate is the conversion?
It uses widely accepted approximate formulas. Actual aging varies by breed.
Is this veterinary advice?
No. This is for fun and general reference only.