Weighted Grade Calculator

Instructions

You can use the calculator above to calculate your weighted grade average. The weights have been put in place, you simply need to enter a gpa (a value on a 4.0-scale) for the indicated items. Once you have entered your data, press the "calculate" button and your estimated course gpa in the results area (a number on a 4.0-scale which will be translated to a letter: A, A-, B+, B, B-, etc). That reported result includes a pctg. symbol, but it really is a gpa, not a percentage of anything.

If you want to calculate the average grade you need on your remaining assignments (or on your final exam) in order to get a certain grade in the class, enter the grade you would like to achieve. If this is the goal once all five items are accounted for, then leave the total weight at 100. (You can change this to a lesser number to correspond to a different stage---such as setting it to 72 to see the GPA you would need on items between now and the final exam (excluded) to reach the desired level.) Press either the “Calculate” button or the “Update” button and you will see your average grade for the class and the results will be displayed in the results area.

How to calculate weighted grade average?

1. First multiply the grade received by the weight of the assignment. Repeat this for each completed assignment.
2. Then add each of the calculated values from step 1 together.
3. Next add the weight of all the completed assignments together.
4. Finally, divide the calculated value from step 2 above by the value calculated from step 3. This gives you the weighted grade average.

Weighted Grade Formula

Weighted Grade = (w₁ x g₁ + w₂ x g₂ + w₃ x g₃ + …) / (w₁ + w₂ + w₃ + …)

Where:

w = weight

g = grade

Example Calculation

Here is an example. Let's say you've got perfect scores on instant-checked homework thus far. Since, on a straight scale, 85% would correspond to a gpa of 3.0 and 95\% would correspond to a gpa of 4.0, your 100% can be viewed as carrying a gpa of 4.5. Now, perhaps on hand-checked assignments to date you have earned 61 out of 73 possible points, roughtly 61/73 = 0.836 or 83.6%. On a straight scale, 80% corresponds to a gpa of 2.5, and 90% with a gpa of 3.5, and so your 83.6% can be viewed as corresponding to a gpa of 2.86.

Let's say, as well, that you have taken two tests, with one test being in the low B range (let's say the gpa for it is about 2.67), and the other in the high C range (let's give it a gpa of 2.35).

To estimate your grade so far, follow these steps:

1. Multiply each gpa by its weight. In this example, you currently have a 4.5 on instant-check homework, worth 9% of your overall grade. So multiply 4.5 x 9 = 40.5. Do similarly for the other known/determined components of your grade: hand-checked homework yields 2.86 x 8 = 22.9, and Midterms 1 and 2 yield 2.67 x 19 = 50.7, and 2.35 x 19 = 44.7.
2. Add the calculated values from step 1 together. We now have 40.5 + 22.9 + 50.7 + 44.7 = 158.8.
3. Add the weight of all included items together. In this case, the included items have weights 9%, 8%, 19% and 19%. That gives us a total (included) weight 9 + 8 + 19 + 19 = 55.
4. Finally, divide the value from step 2 by the value from step 3. That gives us 158.8 / 55 = 2.89. Therefore our weighted GPA is 2.89, just above the threshold 2.85 that divides grades of B- from those of B.