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 the homework assignments you've had to date are worth a total of 73 points, and you have earned 61. That is 61/73 = 0.836, or about 83.6%. Assuming a straight scale for homework (which equates 80% with a gpa of 2.5, and 90% with a gpa of 3.5), this can be viewed as having a gpa of 2.86 on homework.

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 2.86 on homework, worth 20% of your overall grade. So multiply 2.86 x 20 = 57.2. Do the same with the exam gpas, multiplying by the appropriate weights—that is 2.67 x 18 = 48.06, and 2.35 x 18 = 42.3.
2. Add the calculated values from step 1 together. We now have 57.2 + 48.06 + 42.3 = 147.56.
3. Add the weight of all included items together. In this case, the included items have weights 20%, 18% and 18%. That gives us a total (included) weight 20 + 18 + 18 = 56.
4. Finally, divide the value from step 2 by the value from step 3. That gives us 147.56 / 56 = 2.635. Therefore our weighted GPA is 2.64, a B-.