Your files stay on your device

Dog age calculator

Turns a dog's age in years and months into human-equivalent years by size class, with the life stage and an optional lifespan comparison.

Enter the dog's age to convert it.

Multiply by seven is a myth. This tool uses the piecewise curve behind most vet handouts: the first dog year counts about 15 human years, the second adds about 9, and every year after adds a size-dependent amount, because small dogs age slower than giant ones. It is a population approximation, not a DNA-methylation measurement like the 2020 epigenetic clock study, and it is not a veterinary opinion on your dog's health.
Options

More unit & math tools

- Unit converter (/converters/units)
- Date calculator (/time/date-math)
- Fraction calculator (/converters/fractions)
All unit & math tools (/converters)

Was this tool useful?
YesNo

Canonical HTML: https://nutter.tools/converters/dog-age-calculator
Markdown version: https://nutter.tools/converters/dog-age-calculator.md
Plain-text version: https://nutter.tools/converters/dog-age-calculator.txt
Agent index: https://nutter.tools/llms.txt