How old are you now if graduated high school in 1977?

To calculate someone's current age based on their graduation year, we need to know the current year and subtract the graduation year from it.

Assuming the current year is 2023 (the year this response was generated), we can calculate the age of someone who graduated high school in 1977 as follows:

Current Year - Graduation Year = Current Age

2023 - 1977 = 46

Therefore, if you graduated high school in 1977, you would be 46 years old as of 2023.