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🐾 Pet Age Calculator
Convert between human and pet years instantly. Estimate the age of dogs, cats, rabbits, horses, parrots, and more using quick reference multipliers.
Pet Age Calculator
Estimate your pet's age in human years—or the other way around. Pick an animal, enter an age, and we'll apply common veterinary multipliers so you can compare lifespans quickly.
5 human years ≈ 28.5 Dog (small breed) years.
Toy and miniature dogs mature quickly in the first two years, then settle into a slower ageing curve than larger breeds.
Quick lookup table
The table updates automatically with your input so you can compare several pets at once.
| Animal | 1 human year ≈ | Equivalent pet age |
|---|---|---|
| Dog (small breed) | 5.7 years | 28.5 years |
| Dog (medium breed) | 5.3 years | 26.5 years |
| Dog (large breed) | 7.2 years | 36 years |
| Cat | 5.6 years | 28 years |
| Rabbit | 8 years | 40 years |
| Guinea pig | 10 years | 50 years |
| Hamster | 25 years | 125 years |
| Ferret | 7.5 years | 37.5 years |
| Horse | 2.9 years | 14.5 years |
| Parrot (African grey) | 1.5 years | 7.5 years |
| Tortoise (Mediterranean) | 0.7 years | 3.5 years |
| Goldfish | 4.5 years | 22.5 years |
| Bearded dragon | 3.5 years | 17.5 years |
Multipliers are rounded averages sourced from veterinary ageing charts and lifespan studies. Individual animals may age faster or slower based on genetics, health, diet, and environment.
Tips for better estimates
- Puppies, kittens, and other youngsters age dramatically in their first two years. If you need puppy-specific numbers, adjust the multiplier upward for the early months.
- Switch to “Pet → Human years” when you receive age information from a shelter or breeder so you can translate it into a human number at a glance.
- Keep vaccination, dental, and wellness schedules aligned with the equivalent human age—senior pets benefit from more frequent checkups.
Why the ratios differ
Animal lifespans vary widely. Small mammals burn through life in just a few years, while tortoises and parrots can outlive us. These ratios normalise lifespans so you can compare developmental stages between species without memorising every chart.
For precise veterinary advice—especially for exotic pets—pair this calculator with guidance from your vet, who can factor in breed, genetics, body condition, and medical history.
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