Free · Instant · Interactive
Dog Age Calculator - Dog Years to Human Years
Convert dog age to human years with the modern formula by breed size. Free dog age calculator with a conversion table.
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Your inputs
The 7-year rule is outdated — use the modern formula instead.
Your result
Human-equivalent age
32
Life stage
Adult
Formula
15+9+5×2
Table
1yr=15 · 2yr=24
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FAQ
How do you calculate dog years?
The old "1 dog year = 7 human years" is wrong. Modern formula: 15 human years for the first year, +9 for the second, then ~5 per dog year after. Breed size matters.
How old is a 1-year-old dog in human years?
About 15 human years. A 2-year-old dog is roughly 24. After that, each dog year adds ~5 human years.
Do big dogs age faster?
Yes — large breeds mature faster and age quicker than small breeds. A 10-year-old Great Dane is elderly; a Chihuahua may have years left.
How can I help my dog live longer?
Healthy weight, regular vet care, dental hygiene and daily exercise are the biggest factors.
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