Pet Age Calculator
Convert your pet age to human years for dogs and cats
Calculator
Age Comparison
How to Use
Convert your pet's age to human years
Select pet type
Choose dog or cat (and breed size for dogs)
Enter pet age
Input your pet's age in years
View results
See equivalent human age and life stage
Dog Age Formula
Human Age = 16 x ln(dog age) + 31
Modern formula accounts for accelerated early development.
Frequently Asked Questions
No, this is a myth. Dogs mature faster in their first years. A 1-year-old dog is roughly 15 human years, a 2-year-old is about 24. After that, each dog year equals about 4-5 human years, varying by breed size.
Cats also mature quickly. A 1-year-old cat is about 15 human years, 2 years is 24. After 2, each cat year equals roughly 4 human years. Indoor cats often live longer, reaching 15-20 years (76-96 human equivalent).
Yes. Large breeds (Great Danes, Mastiffs) age faster and have shorter lifespans (6-10 years). Small breeds (Chihuahuas, Yorkies) live 12-20 years. Giant breeds can be considered senior at 5-6 years old.
Dogs: Puppy (0-1), Junior (1-2), Adult (2-7), Senior (7-10), Geriatric (10+). Cats: Kitten (0-1), Junior (1-2), Adult (2-6), Mature (7-10), Senior (11-14), Geriatric (15+). Adjust for breed size.