|  This calculator requires the use of Javascript enabled and capable browsers. This script simply tells you the percentage and test grade earned on a test. Input the points possible and the points given. The grade percentage is calculated by dividing the earned points by the total points possible. The formula is: Points earned / Points Possible, then that percentage is compared to the given scale. I added a custom scale option, and an option for plus and minus grades. Enjoy!   The grading scale used for letter grades is as follows:     | A+    100  |   B+    87-89 |   C+   77-79 |  D+   67-69 |     | A     93-96 |  B     83-86 |   C    73-76 |  D     63-66 |     | A-   90-92 |  B-   80-82 |  C-   70-72 |   D-   60-62 |     | F    below  60 |       You may also want to try:  Grade Point Average (GPA) Calculator     |