How to calculate final letter grade for a class?

<p>I'm trying to calculate what my final letter grade would be for physics.
1st marking period: A
2nd marking period: C
3rd marking period: A
4th marking period: A
5th marking period (midterm and final averaged): C</p>

<p>I want to know what final letter grade I would end up with. Is it accurate to use 95 for an A, 85 for a B and so on, then average those numbers together?
I'm not sure how to do this could someone help?</p>

<p>There is a specific technique. It really depends on your school. I can't give you anymore help unfortunately because I have only 4 marking periods.</p>

<p>I dont really think the number of marking periods matters or does it? i mean wouldnt you still avergage it the same way?</p>

<p>well we make it
quarter 1 or 3= 40%
quarter 2 or 4=40%
semester or final= 20%
with an A=4 B=3 C=2 D=1 F=0 and like i still don't completely understand how the grades work so i just memorize the different grades that make it possible to get an A</p>

<p>My school does...</p>

<p>(MP1+MP2+MP3+MP4+.5Midterm+.5Final)/5, which is what I assume yours does too... it'd be a 3.2 on a 4.0 scale I guess. Sorry I can't really say anything for certain unless... you go to my school. :)</p>

<p>It all depends on the school system...maybe just substitute 4 for an A and 2 for a C and average them all together. Our school kinda works like that (only there's two semester grades and they're counted separately, not one final grade...).</p>