Gather all your high school course grades
Check whether your school uses weighted or unweighted GPA
Convert each letter grade to grade points using your school’s scale
Multiply each course’s grade points by its credit value if applicable
Add all grade points together
Add all credits together if applicable
Divide total grade points by total credits to get your GPA
Use your school transcript or report card if available
Ask your school counselor if you need your official GPA
Use your school’s GPA calculator if one is provided