Pet Age Calculator — Dog, Cat & More in Human Years
Convert your pet's age to human years. Supports dogs (all sizes), cats, rabbits, guinea pigs, hamsters, parrots, and horses. Uses the latest veterinary age models including the UCSD logarithmic dog formula. Free, instant, no sign-up.
FAQ
Frequently asked questions about pet age calculator.
Is the '1 dog year = 7 human years' rule accurate?
No — it's a rough average and largely inaccurate. Dogs age very fast in their first two years, then more slowly. A 2020 study by UC San Diego used DNA methylation data to create a more accurate logarithmic formula: human age ≈ 16 × ln(dog age) + 31.
Why do larger dogs age faster than smaller ones?
Larger breeds have shorter lifespans and age more rapidly in their later years. Scientists believe this is related to the metabolic costs of growing a larger body, leading to faster cellular aging.
How old is a 1-year-old cat in human years?
A 1-year-old cat is approximately equivalent to a 15-year-old human. By age 2, cats are roughly equivalent to a 24-year-old. After that, each cat year is approximately 4 human years.
What is the oldest recorded dog?
Bobi, a Rafeiro do Alentejo from Portugal, was recorded as 31 years old in 2023 — equivalent to roughly 280+ human years, though this record is disputed.
How accurate are these conversions?
These are approximations based on average lifespan data and veterinary research. Individual animals vary based on genetics, diet, exercise, and healthcare. Consult a veterinarian for health concerns.