FREE · HEALTH & FITNESS CALCULATORS
Dog Age Calculator.
Convert your dog’s age into human years by size, compare it with the DNA-based formula and the old “times seven” rule, and see its life stage.
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How to use Dog Age Calculator
Enter your dog’s age in years and months and choose its adult size.
How it works
The size chart gives about 15 human years for the first year and 24 at two, then 4–7 years per dog year depending on size. The DNA-methylation formula (Wang et al., 2020) is 16 × ln(age) + 31.
Example
A 6-year-old medium dog is about 42 in human years by the size chart, and about 60 by the epigenetic formula.
Questions about Dog Age Calculator
Is Dog Age Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Estimates for healthy dogs; breeds vary. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.