buncha.tools
buncha/health & fitness/pet-age

Pet Age Calculator

Stays on this device. Translate your pet's age to "human years" using the formulas vets actually use, not the old "multiply by 7" rule (which is wildly off — pets age fast as kittens and puppies, then much slower).
Species
Years
Months
Size band
Big dogs age faster in the back half of life; toy breeds age slower. Pick the closest band.
Human-equivalent age
49 years
Life stage: Adult · Dog aged 3y 0m
Quick reference
1-year-old dog31 human years
2-year-old dog42 human years
5-year-old dog57 human years
8-year-old dog64 human years
12-year-old dog71 human years
16-year-old dog75 human years
How the math works. For cats, the AAHA / Cornell ladder: year 1 ≈ 15 human years, year 2 adds 9, then +4 per year after. For dogs, we use the 2019 UC San Diego epigenetic-clock formula human ≈ 16 × ln(years) + 31 with a small size adjustment in the back half of life (giant breeds age faster, toy breeds slower). It's a heuristic, not a vet exam — useful for context, not for medical decisions.

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About Pet Age Calculator

How old is your dog or cat in human years? Uses the formulas vets actually use — AAHA cat ladder + the 2019 epigenetic-clock dog model — not the old 'multiply by 7' rule. Includes life stage, size-banded dog math, and a quick-reference table.

Like every tool on Buncha, this one runs entirely in your browser. There's no upload, no log, no record of what you've pasted or generated. Close the tab and the data is gone.

↳ Have feedback or found a bug? hello@buncha.tools
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