See your pet's age in human years
Free dog and cat age calculator. Pick a pet, enter age or birthday, get a clear human-year estimate in under a minute.
Dog age
Sized for small, medium & large dogs
Cat age
Quick human-year estimate for cats
Why pet owners use PetAge
Size-aware for dogs
Small, medium, and large dogs age at different speeds — we factor that in
Results in seconds
Enter age or birthday. No account. No guesswork with the old “×7” rule
Care tips by life stage
Short, practical ideas for puppies, adults, and seniors
Works on your phone
Built for quick checks at home or at the vet’s waiting room
How it works
Pick dog or cat
We only support dogs and cats — that’s it
Enter age or birthday
Years and months, or a birth date if you know it
Add dog size (optional)
For dogs, size helps — large breeds often age faster
See the human-year age
Plus a life stage label and a few care tips
What owners say
"Finally stopped using the ×7 rule. Knowing my retriever is closer to mid-life actually changed how we plan walks."
"Took 30 seconds on my phone. The life-stage tips were short and useful — not a wall of text."
"Love that small vs large dogs aren’t treated the same. My Chihuahua’s estimate finally felt right."
"Shared the result with my partner — we both went ‘oh, she’s basically middle-aged.’ Helpful reality check."
Dogs & cats
Built for the pets you actually have
Free
No signup, no paywall
Size-aware
Dog estimates that respect breed size