Pet Age Calculator
How old is your pet in human years? Get an accurate conversion based on your pet's species and size. Dogs age differently based on breed size — our calculator accounts for that.
Larger dogs age faster than smaller dogs after their first two years.
Dog Age Conversion Chart
| Pet Age | Human Years | Life Stage |
|---|---|---|
| 1 year | 15 | Adolescent |
| 2 years | 24 | Adult |
| 3 years | 29 | Adult |
| 4 years | 34 | Adult |
| 5 years | 39 | Adult |
| 6 years | 44 | Adult |
| 7 years | 49 | Adult |
| 8 years | 54 | Adult |
| 9 years | 59 | Senior |
| 10 years | 64 | Senior |
| 11 years | 69 | Senior |
| 12 years | 74 | Geriatric |
| 13 years | 79 | Geriatric |
| 14 years | 84 | Geriatric |
| 15 years | 89 | Geriatric |
Age in Human Years
39
human years old
Prime of life — settled personality and peak health
Average Lifespan
10-14 years
Fun Fact
Dogs can understand up to 250 words and gestures
How We Calculate
Dogs age rapidly in their first two years (15 + 9 = 24 human years), then the rate depends on size. Small dogs add ~4 human years per dog year, while giant breeds add ~6.5 years — which is why larger dogs have shorter lifespans.
Age conversion is an estimate. The "7 dog years = 1 human year" rule is a myth. Modern veterinary science shows that dogs age much faster in their early years and the rate varies significantly by breed size. These calculations follow AVMA and AKC guidelines.