Pet Age Calculator

🐾 Pet Age Calculator

Estimate your dog or cat's age in human-year terms and see a more useful veterinary life-stage view. Hamsters get species-specific lifespan context instead of a made-up human-years conversion.

Pet Type 🐶 Dog 🐱 Cat 🐹 Hamster

Pet's Actual Age

years months

Decimals are okay — for example, 0.5 years is about 6 months.

Adult Dog Size Small — up to 20 lb (9 kg) Medium — 21–50 lb (9.5–23 kg) Large — 51–90 lb (23–41 kg) Giant — over 90 lb (41+ kg) Size matters more in later dog years because larger dogs generally age faster.

Hamster Type Syrian / Golden Chinese Russian Dwarf Typical lifespan varies by hamster type.

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“Human years” are only a comparison tool, not a biological clock or health diagnosis. Breed, genetics, body size, health history, nutrition, and individual variation all affect aging. Veterinary life stage is more useful for planning preventive care.