Dog Age Calculator
Calculate your dog's age in human years using the most accurate science-based method.
Dog Age Calculator
About Dog Age Calculation
The old myth of "one dog year equals seven human years" is not accurate. Dogs age much faster during their first two years of life, and the rate varies by size.
How We Calculate Dog Years
Our calculator uses the most recent scientific research to convert dog years to human years:
| Dog Size | First Year | Second Year | Each Year After |
|---|---|---|---|
| Small | 15 years | 9 years | 4 years |
| Medium | 15 years | 9 years | 5 years |
| Large | 15 years | 9 years | 6 years |
| Giant | 12 years | 8 years | 8 years |
Dog Life Stages
- Puppy: 0-1 year (equivalent to 0-15 human years)
- Junior: 1-2 years (equivalent to 15-24 human years)
- Adult: 3-6 years (equivalent to 25-40 human years)
- Mature: 7-8 years (equivalent to 45-56 human years)
- Senior: 9+ years (equivalent to 61+ human years)