Dog Age Calculator
Calculate your dog's age in human years accurately using the latest research. Results vary based on dog size.
Enter Your Dog's Information
Dog Size:
Did you know? The old "1 dog year = 7 human years" rule is a myth! Dogs age faster in their first two years and then slow down. Size also matters - larger dogs age faster than smaller ones.
Human Age Equivalent
39.0 human years
Life Stage
Adult
Life Progress:
How Dog Years Work
Dogs don't age at a constant rate compared to humans. During their first year, puppies develop rapidly and reach the equivalent of about 15 human years. The second year adds another 9-10 human years. After that, each dog year equals about 4-8 human years depending on size.
Life Expectancy by Size
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Small
12-16 years
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Medium
10-14 years
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Large
8-12 years
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Giant
6-10 years
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
Formula Source: Standard Mathematical References
by Various