ð Dog Age Science
Dogs age faster in their first two years. A 1-year-old dog is roughly 15 in human years. After age 2, aging varies by size - larger dogs age faster than smaller breeds.
Find out how old your furry friend is in human years!
Convert dog years to human years based on breed size
Convert cat years to human years accurately
Calculate tree age in human equivalent lifespan
How many days has your pet been alive?
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Dogs age faster in their first two years. A 1-year-old dog is roughly 15 in human years. After age 2, aging varies by size - larger dogs age faster than smaller breeds.
Cats mature quickly in their first year (15 human years), then slow down. By age 2, a cat is about 24 in human years. After that, each year â 4 human years.
Our calculations are based on veterinary research from AVMA and AAFP guidelines.
Unlike simple calculators, we consider dog size for more accurate results.
Enter years and months for the most accurate age conversion possible.
Puppy (0-1 year)
Rapid growth, training, socialization
Adult (1-7 years)
Prime years, stable behavior
Senior (7+ years)
Slower pace, more care needed
Kitten (0-1 year)
Playful, curious, learning
Adult (1-10 years)
Independent, established personality
Senior (11+ years)
Calmer, needs regular checkups
29 Years
Oldest dog (Bluey, Australia)
38 Years
Oldest cat (Creme Puff, USA)
5,000 Years
Oldest tree (Bristlecone Pine)
470M+
Pet dogs worldwide
No, this is a myth! Dogs age much faster in their first two years, then slow down. Our calculator uses the scientifically accurate method based on veterinary research.
Larger dogs age faster than smaller dogs after reaching maturity. A Great Dane is considered senior at 6-7 years, while a Chihuahua might not be senior until 10-11 years.
Yes! Indoor cats typically live 15-20 years, while outdoor cats average only 2-5 years due to risks from traffic, predators, and diseases.
Regular vet checkups, proper nutrition, exercise, dental care, and lots of love! Keeping pets at a healthy weight can add 2+ years to their life.
Choose a calculator above and discover how old your furry friend really is!