Loading...
Convert dog years to human years by breed size. See life stage and aging comparison.
Dog age in human years is a size-adjusted estimate of a dog's biological maturity compared to humans, accounting for the rapid aging in puppyhood and breed-specific lifespan differences.
human years
🐕 Young Adult
| Dog | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 1 yr | 15 | 15 | 15 | 15 |
| 2 yr | 24 | 24 | 24 | 24 |
| 5 yr | 36 | 37 | 40 | 48 |
| 8 yr | 48 | 52 | 58 | 72 |
| 10 yr | 56 | 62 | 70 | 88 |
| 15 yr | 76 | 87 | 100 | 128 |
Formula
Year 1 = 15 human years, Year 2 = +9, subsequent years depend on size (4–8 per year)Year 1 = 15 human years regardless of size (rapid puppy development)
Year 2 = 9 additional human years
Year 3+ = 4–8 human years per dog year depending on breed size
Worked Example
A 5-year-old medium dog
Did you know? A 2019 study at UC San Diego found that a 1-year-old dog is more like a 30-year-old human in terms of DNA methylation patterns, suggesting dogs mature much faster than previously thought (source: Cell Systems journal).
Sources
Generate random baby name ideas filtered by gender and cultural origin.
See your physical, emotional, and intellectual biorhythm cycles from your birth date.
Find your Chinese zodiac animal and element by birth year with personality traits.
Flip virtual coins with fair 50/50 odds. Track heads vs tails stats over time.
Discover your color personality archetype with a fun 5-question quiz.
Roll virtual dice (D4–D100) with history tracking. Perfect for RPGs and board games.