Dog Years to Human Years
Convert your dog's age to equivalent human years, based on size.
years (1–20)
Size
40
human years
Complete Conversion Table
| Dog age | < 15 kg | 15 – 40 kg | > 40 kg |
|---|---|---|---|
| 1 yr | 20 | 18 | 16 |
| 2 yrs | 28 | 27 | 22 |
| 3 yrs | 32 | 33 | 31 |
| 4 yrs | 36 | 39 | 40 |
| 5 yrs | 40 | 45 | 49 |
| 6 yrs | 44 | 51 | 58 |
| 7 yrs | 48 | 57 | 67 |
| 8 yrs | 52 | 63 | 76 |
| 9 yrs | 56 | 69 | 85 |
| 10 yrs | 60 | 75 | 96 |
| 11 yrs | 64 | 80 | 105 |
| 12 yrs | 68 | 85 | 112 |
| 13 yrs | 72 | 90 | 120 |
| 14 yrs | 76 | 96 | – |
| 15 yrs | 80 | 102 | – |
| 16 yrs | 84 | 110 | – |
| 17 yrs | 88 | – | – |
| 18 yrs | 94 | – | – |
| 19 yrs | 100 | – | – |
| 20 yrs | 110 | – | – |
Source : animal-assur.fr
Frequently Asked Questions
Larger dogs age faster than smaller dogs. A large breed's cells and organs experience more metabolic stress over their lifetime, which accelerates biological aging compared to smaller breeds. This is why a 10-year-old Great Dane is physiologically much older than a 10-year-old Chihuahua.
No — it's a rough simplification. The real relationship is non-linear and depends on the dog's size and breed. A 1-year-old dog is already sexually mature, roughly equivalent to 16–20 human years. The aging rate also slows down as dogs get older.
The conversion table covers large dogs (> 40 kg) up to 13 years. Beyond this age, data is very sparse because few large-breed dogs reach such an advanced age.
The table is based on veterinary research published by animal-assur.fr.