Hi! Being in fourth year, technically my "last 20 courses" aren't complete. They said they go backwards into your 2nd year if you are still completing your undergraduate while applying. I took from this that they will take marks from my fourth year and go back to the beginning of my third year. For me specifically, I have 16 half-course credits from these periods. The missing 4 half courses will be taken from the "annual GPA" of second year (so my second year GPA will count as the grade for 4 of my courses. This is basically what I've been told by others too. I am not 100% sure of this so someone PLEASE correct me if I'm wrong.
This is directly from the OUAC/ORPAS site:
How is my sub-GPA calculated?
The sub-GPA is based on the 10 most recent undergraduate courses, the equivalent of 20 ORPAS course lengths, even if:
the courses did not count toward a degree
the courses were not taken at the university where a degree was awarded
This additional calculation will include supplemental courses (summer, part-time, intersession, correspondence). Failed courses are also included.
Courses without a numeric/alpha grade or any other non-convertible grade will not be included in the calculation (i.e., PASS grade designations).
The sub-GPA is calculated by adding the ORPAS converted grades and course lengths beginning with the most recent grouping/duration, to a total of 20 ORPAS course lengths. Where course grades/lengths must be extracted from a full term to make up the 20 course grades/lengths required, the average of the next grouping/duration of ORPAS GPA values will be used. In the situation, where “Full-time”, “Supplementary” and “Semester” durations exist for the same year, the “Supplementary” grades will be used first, then “Semester” and then “Full-time”.
This calculation will include the current year’s fall terms final