If you have all your grades then you can calculate your sessional average and/or cumulative average.
CA is all years , sessional is only the year just completed.
Calculating average for the year:
Just like a regular average: (Grade in course *#course units)/(# of units taken)
( if you have a zero then you add the zero in)
i.e
Phys 2B06 10
Phys 2H04 9
Phys 2C03 8
Math 2C03 0 (lets pretend you failed this course)
(8*3+9*4+10*6+0*3)/(16)=7.5 (truncated to one decimal point)
Calculating CA:
year 1: SA=10
year 2: SA=9
CA at end of year 2 = 9.5
Reference:
http://registrar.mcmaster.ca /calen...ent/pg145.html