Things You'll Need
- Paper
- Pen or pencil
Instructions
Write down your dog's actual age.
Multiply the first two years by 10.5. That is, the first two years of a dog's life equals 21 human years. If your dog is only 1 year old, it is simply 10.5 human years. Similarly, if your dog is 2 years old, it is simply 21 human years. If your dog is older than two years, continue to step 3.
Subtract your dog's total age by 2 and write down a new total. For example, if your dog is 7 years old, you'll write down the number 5.
Multiply the total you came up with in step 3 by 4 and write down the number. For example, if your dog is 7, multiply 5 by 4 and write down 20.
Add 21 to the new total you wrote down in step 4. For example, if your dog is 7 years old, you would add 21 to 20. Your total would 41 human years.