Mixed Breed (Medium) age in human years
Mixed Breed (Medium)s are medium dogs, and size sets the clock. The first year counts for 15 human years and the second adds 9, which puts a two-year-old at 24. After that each year adds about 5.5. A five-year-old is around 41, and most enter their senior years around 9. Most live somewhere in the 10 to 14 range. Mixed breeds often outlive their purebred cousins, so treat that range as a floor, not a ceiling.
The Mixed Breed (Medium) age chart
| Real age | Human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 3 years | 30 |
| 4 years | 35 |
| 5 years | 41 |
| 6 years | 46 |
| 7 years | 52 |
| 8 years | 57 |
| 9 years | 63 |
| 10 years | 68 |
| 11 years | 74 |
| 12 years | 79 |
| 13 years | 85 |
| 14 years | 90 |
| 15 years | 96 |
Questions people ask about mixed breed (medium) years
How old is a 10-year-old mixed breed (medium) in human years?
About 68. The seven-year rule would say 70; the rates behind this chart say 68, because a mixed breed (medium) adds 5.5 human years per calendar year after age two.
When is a mixed breed (medium) considered a senior?
Most vets start treating mixed breed (medium)s as seniors around 9. That is the point where twice-yearly checkups are worth considering instead of annual ones.
How do you calculate mixed breed (medium) years?
Year one is 15 human years. Year two adds 9, making 24. Every year after adds about 5.5. This chart is generated from the same maths the calculator on the homepage uses.