Shih Tzu Age in Human Years
The Shih Tzu age in human years calculator is a tool for pet parents to understand their dog’s developmental stage compared to humans.
The average lifespan of a Shih Tzu ranges from 10-16 years, which translates to approximately 53-77 human years using this formula.
During the first two years, Shih Tzus develop remarkably quickly, with each year equivalent to 10.5 human years.
For a 7-year-old Shih Tzu:
- Human Years = 1.5 × 10.5
- Human Years = 41 years
Shih Tzu Age in Human Years Conversion Chart
| Shih Tzu Dog Years | Human Years |
|---|---|
| 1 | 10.5 |
| 2 | 21 |
| 3 | 25 |
| 4 | 29 |
| 5 | 33 |
| 6 | 37 |
| 7 | 41 |
| 8 | 45 |
| 9 | 49 |
| 10 | 53 |
| 11 | 57 |
| 12 | 61 |
| 13 | 65 |
| 14 | 69 |
| 15 | 73 |
| 16 | 77 |
Shih Tzu Dog Years to Human Years Formula
- First Two Years (≤ 2 years):
- Human Years = Shih Tzu Age × 10.5
- This reflects their rapid early development
- Beyond Two Years (> 2 years):
- Human Years = 21 + (Shih Tzu Age – 2) × 4
- The base of 21 represents the first two years
- Each additional year adds 4 human years
For a 5-year-old Shih Tzu:
- Using the formula for dogs over 2 years
- Human Years = 21 + (5 – 2) × 4
- Human Years = 21 + (3 × 4)
- Human Years = 21 + 12
- Human Years = 33 human years
How To Calculate Shih Tzu Life Span in Human Years
- Determine Age Range:
- If ≤ 2 years: Use the first formula
- If > 2 years: Use the second formula
- Apply Appropriate Formula:
- For young dogs: Multiply age by 10.5
- For older dogs: Use 21 as base + 4 years per additional year
Let’s calculate for an 8-year-old Shih Tzu:
- Since age > 2 years, use the second formula
- Human Years = 21 + (8 – 2) × 4
- Human Years = 21 + (6 × 4)
- Human Years = 21 + 24
- Final age = 45 human years
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