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Pet Age in Human Years

Convert pet ages to human years for any species

Pet Age in Human Years

Pet Age (years)
Pet

Pet age in human years contextualises a cat or dog's developmental stage. The "1 dog year = 7 human years" is a simplification — the true conversion is non-linear.

  1. 1Dogs age faster in the first 2 years, slower later
  2. 2Year 1 ≈ 10–15 human years; Year 2 ≈ 8–10 more
  3. 3After year 2: ~4–5 human years per dog year (medium breeds)
  4. 4Cats: year 1 ≈ 15; year 2 ≈ 9 more; each year after ≈ 4
8-year-old medium dog=Approx human equivalent: 15 + 9 + (6 × 4) = 48 human years
Dog ageHuman equivalent (medium breed)
1 year~10–15
2 years~24
5 years~36
10 years~57
15 years~76
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