Dog Years / Cat Years Calculator

Dog note: It is a common belief that 1 human year is equal to 7 dog years. That is not very accurate, since dogs reach adulthood within the first couple of years. The formula used here is from a canine expert. The formula is: 10.5 dog years per human year for the first 2 years, then 4 dog years per human year for each additional year.

Cat note: There are several models for determining cat years. Experts generally agree that the first two years of a cat's life are roughly equal to the first 25 of a human's and each additional year equals approximately four 'cat years'. The formula is: 15 years for the first year, 10 years for the second year, then 4 cat years per human year for each additional year.

Enter your age in years:

Your age in dog years is:

Your age in cat years is:

Enter pets age in years:

If your dog were human
it would be
years old.

If your cat were human
it would be:
years old.