Click Calculations

Pet Age Converter

Enter how many human years your dog or cat has lived—or pick their birth month and year to calculate it automatically—and we'll translate that into pet years using veterinary growth curves.

How to use this tool
  • SpeciesChoose dog or cat to apply the correct growth curve.
  • Human years livedEnter the pet's age in human years. Decimals are OK for partial years.
  • Birth month & yearOptional. Select the birth month to auto-calculate human years based on today's date.

Press Convert to pet years to estimate the pet-equivalent age and view the reference chart. Reset clears the inputs.

Select the birth month to auto-fill human years using today's date.

Ages are approximate: young pets age quickly in the first two years, then level off. We use a medium-size dog model and an indoor cat model for the conversion.

Quick reference

Keep in mind that breed size, health, and lifestyle can shift these estimates. Always consult your veterinarian for individualized advice.

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