Your assignments
Weights come from your syllabus. They do not have to add up to 100 yet.
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Why the weight matters more than the score
A class grade is rarely a plain average of everything you handed in. Teachers decide in advance how much each piece of work counts, which is why a perfect homework score can barely move your grade while a mediocre exam drags it down noticeably. The syllabus you were given in the first week is where those percentages live, and reading it properly is the single most useful thing you can do for your grade.
This calculator multiplies each score by its weight, adds those together, then divides by the total weight you entered. That last part matters mid-semester. If only sixty percent of the class has been graded so far, you still get a fair picture of where you stand on the work that has actually been marked, rather than a number dragged toward zero by assignments that have not happened yet.
Reading the result honestly
The note under your grade tells you whether the weights you typed add up to a full hundred percent. When they do not, treat the number as your standing on completed work rather than a prediction of your final grade. Once the remaining assignments are graded and entered, the two figures converge.
If your teacher groups work into categories with a single weight each, such as homework counting for twenty percent as a whole regardless of how many assignments it contains, the weighted grade calculator handles that structure properly. And when you only want to know what the final exam has to deliver, the final grade calculator answers it in one step.