After making a not-so-wonderful grade on my mid-term, I decided I needed to figure out what my current grade is in my summer class. I'm not a whiz at math, and so I googled to find a website that would figure my letter grade for me quickly. Sure, I could have done it myself if I wanted to invest some time, but I wanted to figure it out fast so math.com was my answer.
All you have to do is enter the number of points you received and the number of points possible. Then, the calculator figures the percentage. Obviously, you can see from that percentage if it is an A (90 & above), B (80 & above), C (70 & above), etc.
The website gives you a couple of different options of figuring your grade. I used the second one, BTW. Good luck with the rest of your semester!