Help?! Do universities round up or down your module marks and final year grades???

Hi, I just finished uni and worried about the grade Im gna get - I'm on the borderline between a 2.1 and 1st.

Last year across all my 6 of my modules I got 67.83333 marks. I'm assuming this is rounded up to 68 when they add it with my 3rd year final grade?

This year, I already know the grades for 2 of my modules which were 100% coursework and partially for another 2 module.

Module 1: final grade 63.5 (20 credits)

Module 2: final grade 76.8 (20 credits)

Module 3: partial result 64.5 - 30% of grade, awaiting 70% exam result (20 credits)

Module 4: partial result 55 - 30% of grade, awaiting 70% exam result (20 credits)

Module 5: dissertation - awaiting results (40 credits).


As you can tell a first really depends on my Dissertation performance (assuming my exam results put my modules by a few marks - most of my exams throughout my uni lidpfe has actually improved on my essay averages). But EVERYTIME I calculate my results I ALWAYS, end up with something ridiculously close to a first like 68.888 or 69.4222 - its really doing my head in and Im worried what may actually seperate me from a 1st and 2.1 may just be an essay I didnt spend an extra hour or two working on....

Has anyone alse been in this position and did you get a first or miss out?