Use this dog age calculator to translate your pup's birthday into human years with a vet-informed formula that accounts for the quick growth of the first two years and the role size plays later in life.
Estimated human age
Prime years - focus on daily routines
Based on the first-two-years = 10.5 human years rule plus 5x for every adult year in the medium size range.
Log this life stage with WoofSheet →The estimate is just the start. WoofSheet keeps a living log of your dog's health habits so family members and sitters always see the same history.
We map the first two dog years to 21 human years (10.5 per year). After that, every additional year is multiplied by a size-based factor inspired by guidance from the AAHA and AKC. It keeps calculations simple while reflecting that bigger dogs age faster once they reach adulthood.
Choose the size bucket that best matches your dog's adult weight to fine-tune the estimate.
Pair this estimate with WoofSheet's shared log to organize meals, meds, bathroom notes, and handoffs with the people who help care for your dog. A consistent record helps vets see changes sooner.
A 1-year-old dog is often estimated at about 15 human years, though size and breed can affect aging.
Not exactly. Dogs age more quickly in their first two years, then the pace varies by size and breed.
Yes. Smaller dogs often age more slowly than larger dogs in adulthood.
No. It provides an estimate based on common veterinary guidance and general life-stage patterns.
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