Weighted grades versus points
In a weighted course, each category has a share of the final grade, and the number of points inside it does not matter. A 10-point quiz and a 100-point project can count the same if both categories carry 15%. In a points course, every point counts equally, so a 200-point exam weighs twice as much as a 100-point one. Check the syllabus or ask the teacher which method applies, because the same marks can give quite different grades. If a category such as homework has many items, you can enter its average once with the category weight, or enter each item with an equal share of that weight.
Your grade so far, before every weight is used
Halfway through a term you have only some of the marks. The calculator divides by the weight you have entered, so after 60% of the course at an average of 82%, it shows 82%, not 49.2%. That is your standing on the work done so far. If the weights you enter add up to more than 100%, the calculator warns you, as that usually means a weight was typed twice. Extra credit is allowed: a score of 105 out of 100 is counted as 105%.
The score you need on the final
If the final exam counts for w% of the grade and everything before it stands at your current grade, the score you need is (target − current × (1 − w)) ÷ w. With a current grade of 82%, a final worth 40% and a target of 85%, that is 89.5%. If the answer is above 100%, the target cannot be reached on the final alone without extra credit; if it is zero or below, you have already secured it. You can also type a current grade directly, for example the one on your school portal, instead of entering every item.
Letter grades and other systems
Schools turn percentages into letters, GPA points or bands in different ways. A common American scale puts an A at 90% and above, but many schools use plus and minus grades or other cut-offs, and universities in the Gulf, the UK and elsewhere use their own bands. Use the cut-offs in your own syllabus to read the result. For Saudi university admission, where the high school average, Qudurat and Tahsili are combined, the weighted percentage calculator offers common preset weights.