Grade Average Calculator

For a simple average, add up the grades and divide by the number of grades. For a weighted average, multiply each grade by its weight, sum those products, and divide by the sum of weights. The simple average treats every grade equally; the weighted average lets bigger weights count for more.

Simple average treats every grade as equally important. Weighted average lets you say one grade counts more than another. If your syllabus says the midterm is worth more than a quiz, weighted average gives the correct overall grade; if you just want the mean of five test scores, simple average is enough.

No. The calculator normalizes whatever weights you enter. You can use 1, 2, 3 for relative importance, or use percent weights like 20, 30, 50. The math gives the same answer as long as the proportions are the same.

This calculator uses a standard scale: A is 90 to 100, B is 80 to 89.99, C is 70 to 79.99, D is 60 to 69.99, and F is below 60. Letter grade is shown as an estimate; your school or instructor may use slightly different cutoffs.

Yes. Enter grades above 100 to include extra credit. In simple mode the extra credit lifts the mean directly. In weighted mode it lifts the weighted result in proportion to the weight of that row.