Pet Age Calculator
Convert your dog's or cat's age to human years, accounting for dog size differences, with a life-stage indicator. Everything runs in your browser.
Enter your pet's age
FAQ
Why not the old '1 year = 7' rule?
Pets mature much faster early on. Vets recommend 15 human years for year one, +9 for year two, then +4–6 per year—which this tool follows.
Why do large dogs age faster?
Larger breeds have shorter lifespans, so after age 2 we add 4/5/6 human years per year for small/medium/large dogs, with an earlier senior threshold for large breeds.
What if I only know months?
Enter fractions of a year: 6 months = 0.5, 18 months = 1.5.
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