How do canadian universities look at grades?

<p>Sorry for the ambiguous title. My question is sort of hard to encapsulate in a sentence.
I'm a Canadian citizen, as are both of my parents. I've lived in America my entire life because of my dad's job (with the exception of spending summers at our cottage in Canada), but I'd like to go to university in Canada. While in Canada this weekend, I bought a copy of Maclean's college rankings for 2011, and I saw some reference to a grade in the 80's (though I forget what it was specifically). That grade was referenced as an A. Obviously, there are differences between American and Canadian grading standards. For that reason, my question is this:
How will Canadian schools look at my grades? If I have B's, for instance, but they are numerically Canadian A's, how are they treated?</p>

<p>Also, on a somewhat related note, which years of high school are the most important to Canadian unis?</p>

<p>If I remember correctly, the Ontario system, doesn’t attribute %s to Letter Grades or vice versa. </p>

<p>But that doesn’t matter, based on UofT’s website,it seems that Canadian Universities do not convert grades. This is their admission requirements for someone interested in Engineering. </p>

<p>"Grade 12 Diploma in an accredited high school with a high grade point average and SAT Reasoning/ACT exams and AP/IB Calculus or SAT Mathematics (1 or 2) andSAT Subject Tests in both Chemistry and Physics. English Grade 12/AP English is required for all programs. </p>

<p>Other prerequisite courses should be presented at Grade 12 level/SAT Subject Tests/AP subjects/IB HL. </p>

<p>Students seeking admission to Engineering after one year of university in the U.S. are required to present a GPA of at least 3.5 with two semesters of Math, Physics and Chemistry. </p>

<p>SAT, AP and ACT scores should be sent to us electronically. SAT and AP institution code is 0982 and ACT institution code is 5366.
No transfer credit is awarded for AP or IB courses by the Faculty of Applied Science and Engineering.
Online Student Profile Form is required."</p>

<p>You can find other requirements on the site below:
[url=&lt;a href=“http://www.adm.utoronto.ca/adm-awards/admissions.action]Admissions[/url”&gt;http://www.adm.utoronto.ca/adm-awards/admissions.action]Admissions[/url</a>]</p>

<p>I’m sure such requirements would be somewhat similar to other Universities.</p>

<p>For comparison, I don’t think McGill’s requirements are nearly as strict, at least not for their faculty of arts.</p>

<p>Wrong, McGill Arts admission mimimum grades and scores are higher than Toronto’s for American applicants:
[Admissions</a> standards for previous years | Undergraduate Admissions - McGill University](<a href=“http://www.mcgill.ca/undergraduate-admissions/counsellors-and-advisors/united-states/admissions-standards-previous-years]Admissions”>http://www.mcgill.ca/undergraduate-admissions/counsellors-and-advisors/united-states/admissions-standards-previous-years)</p>

<p>To be fair, TomofBoston, UofT’s requirements did not specify any GPAs or Letter Grades for high school applicants. Their 3.5 GPA requirement as stated was for sophomore transfers.</p>

<p>However, traditionally, UofT’s undergraduate admissions are not as selective as the ones for McGill, except for possibly Engineering Science and for good reason.</p>