Weighted grade calculator
Calculate a weighted grade from assignment or exam percentages and course weights. See the average on completed work and its full-course contribution.
Your graded work
Your weighted grade
Enter scores and their course weights, then calculate.
Use course weights, not raw marks
Convert marks to percentages first: 18 out of 20 is 90%. Enter the weight assigned in your syllabus. Do not enter both a category and its component assignments, which would count the same work twice.
Average and contribution
Course contribution = sum(score × weight ÷ 100). Average across entered work = contribution ÷ (total weight ÷ 100). Scores of 80% at 40% weight and 90% at 60% weight give 86%. With only the first item entered, the average is 80% and its contribution is 32 course percentage points.
Zero-weight rows do not affect the result. At least one weight must be positive; total weight cannot exceed 100%. Calculations retain precision and display two decimals. Extra credit, dropped grades, curves, and institutional rounding are not modeled.
Find the final score needed for your target.
Weighted averages for assignments, tests and course grades
Take component weights from your syllabus and enter each score as a percentage. Check whether the rows represent individual assignments or whole categories: if exams are worth 40% altogether, do not give every exam a separate 40% weight.
A score of 80% on work worth 40% contributes 32 percentage points toward the course. If that is the only completed row, the average over entered work is 80%, while its full-course contribution is 32 points. The ungraded 60% is still unknown; neither figure is a prediction of the final grade.
Before comparing the result with a gradebook, check dropped assignments, category averaging and extra-credit rules. If assignments within a category have different point totals, calculate the category score according to the syllabus before entering its overall course weight.
Common questions
How do I calculate a weighted average grade?
Multiply each percentage score by its percentage weight, add the products and divide by the sum of entered weights. An 80% score weighted at 40% and a 90% score weighted at 60% produce an 86% course grade when those rows cover the whole course.
What is my current grade if only half the course is graded?
Use the average over entered work to describe performance on completed components. Their contribution toward the full course is a different result. For example, an 80% average on work worth 50% contributes 40 course points; it does not mean the final grade is 40% or 80%.
Must my weights add up to 100%?
A complete ordinary course calculation should use the full 100%. A partial calculation can use less; the result distinguishes the entered-work average from course contribution. Totals above 100% are rejected.
Can I mix raw marks and percentages?
Convert raw marks first. For example, 18 out of 20 is 90%. Enter 90 as the percentage, rather than 18, alongside the correct course weight.
Can I model a possible future score?
Yes. Enter a hypothetical score for a remaining component and label it clearly for your own use. The result reflects that assumption and does not predict performance.