Dog Age Calculator
Enter your dog's age and size category to find the human age equivalent, life stage and care recommendations.
Dog size
Dog age (years)
Dog age (months)
Dog Age to Human Age: Correct Conversion by Breed Size
The rate of aging in dogs varies significantly by breed size. Small breeds (Chihuahua, Yorkshire Terrier) age more slowly and can reach 14–18 years, while large breeds (German Shepherd, Labrador) age faster and typically live 10–12 years. Specifying your dog's size category is therefore essential for an accurate conversion.
Dog Age Chart – By Breed Size
| Dog Age | Small Breed | Medium Breed | Large Breed |
|---|---|---|---|
| 1 | 15 | 15 | 15 |
| 2 | 24 | 24 | 24 |
| 3 | 28 | 28 | 29 |
| 5 | 35 | 36 | 38 |
| 7 | 42 | 44 | 48 |
| 10 | 53 | 56 | 63 |
| 13 | 64 | 68 | 78 |
| 15 | 71 | 76 | 88 |
* Human year equivalents. Small: ≤10 kg, Medium: 10–25 kg, Large: >25 kg.
Care Tips by Age
Puppy (0–1 year): Vaccination schedule, socialization and basic training are critical. Young adult (1–6 years): Annual vet check, regular exercise and dental care. Middle-aged (6–9 years): Joint health, appropriate diet and weight control. Senior (9+ years, 11+ for small breeds): Vet visit every 6 months, blood tests, floor modifications for easier movement.