Dog Age Calculator
Convert your dog's age to human years accurately. Our calculator accounts for breed size — small, medium, and large dogs age at different rates.
How Dogs Age by Size
Small Dogs (<20 lbs)
Live 12-15+ years. Age slowly after year 2 (+4 human years per dog year).
Medium Dogs (20-50 lbs)
Live 10-13 years. Moderate aging after year 2 (+5 human years per dog year).
Large Dogs (50+ lbs)
Live 8-12 years. Age faster after year 2 (+6 human years per dog year).
How to Use This Calculator
- Enter your dog's age in years
- Select your dog's size category (small, medium, or large)
- Click "Calculate Dog Years"
- See the equivalent human age based on the appropriate formula