Grade Calculator
Enter each assignment's score and weight to see your overall course grade and letter, updated as you type.
How it works
Not every assignment pulls on your grade equally. A final worth 40% moves your average far more than a quiz worth 5%, so the score alone never tells the whole story — the weight behind it does.
Give each row a score and the percentage of the grade it covers. The calculator multiplies each score by its weight, adds those up, and divides by the total weight you entered. Say you scored 92 on something worth 20 and 78 on something worth 50 — you land closer to the 78 because it carries more than twice the pull.
The weights don't have to hit exactly 100. If they add up to 80, it scales the math to what you gave it, so a mid-semester grade with only some categories graded still comes out sensible.
Frequently asked questions
Do my weights have to add up to 100%?
It's cleaner if they do, but the calculator handles it either way. It divides by whatever your weights sum to, so a partial grade sheet still returns a fair proportional average instead of a broken number.
How does a weighted grade differ from a plain average?
A plain average treats every assignment as equal. A weighted grade respects that a big exam counts for more than a warm-up quiz, so it reflects what your syllabus actually says your grade is built from.
What letter grade does each percentage map to?
The common scale used here is 90 and up for an A, 80s for a B, 70s for a C, 60s for a D, and below 60 an F. Your school may cut the lines slightly differently, so check your syllabus if you're near a border.