OK just to have some fun here.
Most (I won't willingly say all) Australian higher education institutions use a seven point grading system. With a few variations they look like this
7.0 = High Distinction (HD)
6.0 = Distinction (D)
5.0 = Credit (C/Cr)
4.0 = Pass (P)
1.5 = Fail
Notable variations include the concept of a 'conceded pass', usually awarded after an applicant passes a supplementary exam that they were made to sit due to failing grades and weighted at 3.0, and 'low' and 'high' passes (usually given the weightings of 4.0 and 4.5 respectively).
The percentage grades cutoffs for each grading band often differ between but usually not within Australian institutions (I'm looking at you Canadian universities
). A generic example would look like this:
85-100 = HD = 7.0
70-<85 = D = 6.0
60-<70 = C = 5.0
55-<60 = P1 = 4.5
50-<55 = P2 = 4.0
<50 = F =1.5
(Aside:) By not distinguishing between fields of study, this system inflates the grades of Maths/Science students when compared to Social Science students or increases the pressure on the former faculties to increase the difficulty of their examinations. This is somewhat amusing because grading systems were introduced specifically to bring parity to scores across fields of study.
Unless I've messed up on my maths, it is impossible to accurately compare academic merit across disciplines and institutions without some sort of auditing of examinations offered at each institution.
In my opinion, relative marking (ie. how is your academic performance compared with your classmates) is probably more instructive.Long story short, each institution you apply for will probably want to use their own system of conversion. So long as you provide a transcript and a grading system, you should be set