The Pet Age Calculator helps you convert your dog’s or cat’s age into human years. Simply fill in the fields above and click Calculate to get an instant result.
This calculator is part of Calculate Wiki’s Pet Calculators collection.
What You’ll Need
- Pet Type
- Pet Age (years)
- Size (dogs only)
Formula Used
Cats & Dogs (Year 1) = Age × 15
Year 2 adds 9 more human years
Each year after that adds a size-adjusted number of human years (4 for cats; 4–7 for dogs depending on size)
Example Calculation
Using example inputs — Pet Type = dog; Pet Age = 3 years; Size (dogs only) = medium — the Pet Age Calculator returns:
| Value | Result |
|---|---|
| Human-equivalent age | 29 years |
29 human years. Dog age 3 years ≈ 29 human years.
Helpful Information
Results from the Pet Age Calculator are estimates based on standard formulas used in the pet calculators field. For projects with significant cost, health, or safety implications, consider verifying results with a qualified professional.