Dog Age Calculator
Calculated in your browser — we never store your dataVerified formulas with automated testing
Use decimals for puppies (e.g., 0.5 for 6 months)
Age by Size Comparison
smallAdult
37 yearsmediumAdult
39 yearslargeAdult
41 yearsgiantAdult
44 yearsLife Stages
PuppyRapid growth, socialization critical
0-6 monthsJuniorAdolescence, continued growth
6-12 monthsYoung AdultReaching full maturity
1-3 yearsAdultPrime of life, stable health
3-7 yearsMatureSlowing down, more vet visits
7-10 yearsSeniorSpecial care needs, extra comfort
10+ yearsDid You Know?
The old "7 years per human year" rule is a myth. A 1-year-old dog is closer to a 15-year-old human, and aging slows after the first two years. Smaller dogs tend to live longer but mature faster initially.
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