Python Exercise: Calculate a dog's age in dog's years

Last update on April 17 2025 12:58:20 (UTC/GMT +8 hours)

31. Dog Age in Dog Years

Write a Python program to calculate a dog's age in dog years.
Note: For the first two years, a dog year is equal to 10.5 human years. After that, each dog year equals 4 human years.

Pictorial Presentation:

Python Exercise: Calculate a dog's age in dog's years

Sample Solution:

Python Code:

# Request input from the user to provide a dog's age in human years and convert it to an integer
h_age = int(input("Input a dog's age in human years: "))

# Check if the entered age is less than zero; if true, display an error message and exit the program
if h_age < 0:
    print("Age must be a positive number.")
    exit()
# If the entered age is 2 years or less, calculate the dog's age in dog's years using the formula 10.5 times the human years
elif h_age <= 2:
    d_age = h_age * 10.5
# For ages greater than 2, calculate the dog's age in dog's years using the formula 21 plus 4 times the remaining human years after 2
else:
    d_age = 21 + (h_age - 2) * 4

# Display the calculated dog's age in dog's years
print("The dog's age in dog's years is", d_age)

Sample Output:

Input a dog's age in human years: 12                                                                          
The dog's age in dog's years is 61

Flowchart :

For more Practice: Solve these Related Problems:

Write a Python program to convert a dog's age in human years to dog years using different multipliers for the first two years and subsequent years.
Write a Python program to prompt the user for a dog's age and output the equivalent dog years with conditional calculations.
Write a Python program to implement the dog age conversion using a function that handles fractional human ages.
Write a Python program to calculate dog years by reading input and applying a formula that distinguishes between early and later years.

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Python Code Editor :

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