Calculate real age from birthday
The result is shaped into a readable age display for the card.
Dog and cat age in human years
Dogs and cats age a little faster than people. Choose a dog or cat breed to estimate your pet’s age in human years.
Check the age first. Make a card if it feels useful.
Human age calculator
Choose a dog or cat breed and enter a birthday. The estimate is based on how quickly small, medium, and large dogs and cats reach adulthood, plus the average lifespan for each breed.
1. Choose your pet breedSelected: Not selected yet
Choose a dog breed
Choose a cat breed
Is a dog or cat year really seven human years?
People often say you can multiply a dog or cat age by seven, but that simple rule does not always feel right. Puppies and kittens grow quickly, and the way dogs and cats age after reaching adulthood also differs by breed.
Reflect breed lifespans
Breed differences are considered when estimating human age.
Ready for a pet card
The estimate becomes a natural starting point for creating a card.
Turn the result into a shareable profile
After checking the age, add a name, photo, SNS links, and memo to create a pet card. It works for dog parks, pet events, SNS profiles, and everyday introductions.
- Hand it out at dog parks or pet events instead of a paper card
- Link from an SNS profile or post to your pet card URL
- Attach a QR code to an ID tag or personal item as a helper page
- Keep growth notes and senior-care details in a place family can revisit
- 1Choose a breed
- 2Enter a birthday
- 3Check the human-age estimate
- 4Create a photo card
Human age is an estimate. Growth and aging vary by pet. If you are worried about health, please consult a veterinarian.