Your Dog's Life,
Stage by Stage

A personalized milestone calendar that maps your dog's real age to developmental stages, adoption anniversaries, and vet check-up windows. Print cards for every big moment.

Build Your Dog's Calendar

Set Up Your Dog's Profile

Tell us about your dog and we'll build a milestone timeline tailored to their breed size and age.

Dog's Name

Birth Date or Adoption Date Use adoption date if birth date is unknown

Breed Size

Small Under 20 lbs (Chihuahua, Pomeranian, Yorkie) Medium 20–50 lbs (Beagle, Corgi, Border Collie) Large 50–90 lbs (Labrador, Golden Retriever, Husky) Giant Over 90 lbs (Great Dane, Mastiff, Saint Bernard)

This date is the dog's:

Why Breed Size Matters

Large dogs age faster in their first two years and reach senior status earlier. A 6-year-old Great Dane is a senior, while a 6-year-old Beagle is still in their prime. This calendar adjusts for that.

The Old Rule Is Wrong

"One dog year equals seven human years" is a myth. Dogs mature quickly in the first two years, then the pace slows. Our formula follows current veterinary research.

What You'll Get

Developmental milestones (puppy, adolescent, adult, senior)
Adoption anniversary dates
Suggested vet check-up windows
Printable milestone cards
A shareable link to your dog's calendar

Saved Dogs

Your dog profiles are stored in this browser. Click one to reload their calendar.

No saved dogs yet. Build a calendar and click "Save Profile" to add one.

How This Calendar Works

The Age Formula

We use a breed-size-adjusted formula based on veterinary research. The first year of a dog's life equals about 12–15 human years depending on size. The second year adds about 6–9 human years. After that, each dog year equals roughly 4–7 human years, with larger breeds aging faster.

For example, a 3-year-old small dog is about 28 in human years. A 3-year-old giant breed is about 34. That difference grows over time.

Milestone Windows

Each milestone covers a range of dates because development isn't a single day. "Adolescence" might span 6–18 months depending on breed size. The calendar shows the window so you know when to expect changes in behavior, energy, and health needs.

Vet Check-Up Timing

Puppies need visits every 3–4 weeks until 16 weeks old. Adult dogs benefit from annual check-ups. Seniors should go every 6 months. The calendar suggests windows for these visits, but always follow your own vet's schedule.

Common Mistakes

Using the 7-year rule. It overestimates young dog ages and underestimates old dog ages.
Ignoring breed size. A 10-year-old Chihuahua and a 10-year-old Great Dane are in very different life stages.
Skipping senior check-ups. Dogs over 7 (large breeds) or 10 (small breeds) need more frequent vet visits.
Forgetting adoption anniversaries. These matter just as much as birthdays for rescue dogs.

Rescue Dogs

If you adopted your dog and don't know their exact birth date, use the adoption date as the starting point. Many rescues provide an estimated age from a vet. You can enter that as the birth date and select "Birth Date" as the type. The milestones will still be useful as general guideposts.

Printing Cards

Each milestone card is designed to print on a single sheet. Click "Print Card" on any milestone to open a print-friendly version. For best results, use letter-size paper and set margins to "None" or "Minimum" in your print settings.

Your Dog's Life, Stage by Stage