Short Answer 
To calculate your year of birth, first identify the current year (e.g., 2023), then confirm your age (e.g., 15 years). Subtract your age from the current year using the formula: Year of Birth = Current Year – Age (e.g., 2023 – 15 = 2008).
Step 1: Identify the Current Year
To calculate the year you were born, first, find out the current year. For instance, if the present year is 2023, this will be your reference point for the calculation.
Step 2: Know Your Age
Next, confirm your current age. In this example, if you are 15 years old, this is the number you will use in your calculation. Your age tells you how many years have passed since you were born.
Step 3: Calculate Your Year of Birth
Finally, subtract your age from the current year to find your year of birth. Use the formula: Year of Birth = Current Year – Age. So, 2023 – 15 = 2008. Therefore, if you are 15 years old in 2023, you were born in 2008.