Shih Tzu age in human years
Shih Tzus are small 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 4.5. A five-year-old is around 38, and most enter their senior years around 10 or 11. Most live somewhere in the 10 to 16 range.
The Shih Tzu age chart
| Real age | Human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 3 years | 29 |
| 4 years | 33 |
| 5 years | 38 |
| 6 years | 42 |
| 7 years | 47 |
| 8 years | 51 |
| 9 years | 56 |
| 10 years | 60 |
| 11 years | 65 |
| 12 years | 69 |
| 13 years | 74 |
| 14 years | 78 |
| 15 years | 83 |
Questions people ask about shih tzu years
How old is a 10-year-old shih tzu in human years?
About 60. The seven-year rule would say 70; the rates behind this chart say 60, because a shih tzu adds 4.5 human years per calendar year after age two.
When is a shih tzu considered a senior?
Most vets start treating shih tzus as seniors around 10 or 11. That is the point where twice-yearly checkups are worth considering instead of annual ones.
How do you calculate shih tzu years?
Year one is 15 human years. Year two adds 9, making 24. Every year after adds about 4.5. This chart is generated from the same maths the calculator on the homepage uses.