Example: 40% coursework and 60% exam
- Coursework32 points
80 × 0.40 = 32
- Exam42 points
70 × 0.60 = 42
- Weighted outcome74%
32 + 42 = 74
Use the weighting your course actually applies
A weighted grade calculator combines scores that do not have equal importance. A short quiz might count for 10% of a course while a final project counts for 40%. Their percentages describe performance on each task; their weights describe how much those performances contribute to the overall result. You need both pieces of information.
This tool supports percentage assessment weights and relative weights such as module credits. Choose the mode before entering rows, because the interpretation of the total changes. It calculates a weighted average of the included work, and in percentage mode also separates the course contribution from the current average when some work is still ungraded.
Prepare one consistent row per assessment
For each row, enter a percentage score from zero to 100 and a positive weight. Use an awarded zero when work really received zero marks. Leave unfinished assessments out rather than entering an invented zero, unless the course policy has already awarded one. Add or remove rows until the set reflects the record you want to analyze.
In percentage mode, included weights must not exceed 100%. A full course normally totals 100%, while completed work can total less. In credit mode, enter credits or another consistent relative unit. Do not put 20 credits in one row and 40% in another: those numbers are not interchangeable measures of academic weight.
Follow the multiply, add and divide method
Weighted average = Sum of (Score × Weight) ÷ Sum of weights.
Multiplying first gives larger assessments a larger influence. Adding the products combines their contributions, and dividing by the total weight returns the result to the percentage scale. When all weights are equal, this becomes the simple average. When weights differ, averaging the score percentages alone usually answers a different question.
Multiplying every relative weight by the same positive number leaves the result unchanged. A 2-to-3 weighting produces the same average as 20-to-30 or 40%-to-60%. That property is useful when checking credit-based calculations, but it does not authorize changing a syllabus's actual distribution between assessments.
See a complete course calculation
Imagine coursework scored at 80% and worth 40% of the course, followed by an exam scored at 70% and worth 60%. Their weighted products are 3,200 and 4,200. Add them to get 7,400, then divide by the total weight of 100. The overall weighted average is 74%.
The coursework supplies 32 course percentage points and the exam supplies 42. A simple average of 80 and 70 would give 75%, which overstates the result because it gives the stronger coursework the same influence as the heavier exam. If the exam improved to 80%, both scores would be 80% and the weighted result would also be 80%.
Distinguish current average from earned contribution
Suppose only the 80% coursework from that example has been graded. Its 40% weight means it has earned 32 course percentage points. However, the average of the completed work is still 80%. The tool displays that normalized current average alongside the completed weight and ungraded share, rather than silently treating the exam as zero.
Those figures answer separate questions. The current average describes performance on what is included; the contribution describes how much of the eventual full-course percentage has been supplied. Neither is a forecast for the remaining 60%. Use a final or remaining-grade target calculator to explore the score needed on unfinished work instead of assuming the current average will continue.
Apply credits without awarding a degree class
For module marks of 65% over 20 credits and 75% over 40 credits, the calculation is (65 × 20 + 75 × 40) ÷ 60 = 71.666…%, displayed as 71.67%. The second module has twice the influence because it has twice the credits. There is no need to make those credit values add to 100.
A credit-weighted percentage is not automatically an official degree classification. Institutions may weight years differently, exclude some modules, cap reassessment marks or apply borderline rules. If the university combines year averages with separate year weights, calculate each required stage according to its regulations rather than placing every raw module into one undifferentiated list.
Avoid mixing categories and points totals
A category with several assignments may require its own calculation first. If quizzes count for 20% overall, do not give every individual quiz a 20% course weight. Calculate the quiz-category percentage using the instructor's rules, then use one row for the whole category with weight 20. Do the same for the other categories.
Points-based courses are different. Earning 18/20 and 70/100 gives 88/120 = 73.33% when marks are pooled. Averaging 90% and 70% gives 80%, while assigning category weights can produce another result. Determine which system the syllabus uses before choosing the inputs. Extra credit and dropped scores should be resolved inside the appropriate category before its percentage is entered here.
Keep category weights from being counted twice
Suppose quizzes count for 20% and the exam for 80%. Two equally weighted quizzes at 60% and 100% have an 80% category average. With a 75% exam, the result is 80 × 0.20 + 75 × 0.80 = 76%. Use one quiz-category row at 20%, or two quiz rows at 10% each if the category rules permit that equivalent arrangement. Giving each quiz the full 20% would duplicate its influence.
Compare changes where they matter most
To test a possible improvement, change just one score while keeping its legitimate weight fixed. A ten-point improvement in an assessment weighted at 15% adds 1.5 course percentage points; the same improvement in a 50% assessment adds five. This comparison can help you understand influence, although it does not measure how much study time a particular improvement will require.
Keep a note of the included assessments and the date of their grades. When new marks arrive, add them and check the remaining weight again. If the total is unexpectedly above 100 or far below the course's completed share, look for duplicated categories or omitted work before using the result to plan your next step.
Frequently asked questions
Can a weight be a decimal?
Yes. Positive fractional weights work when they reflect the grading policy. The relative relationship matters; use the same unit for every row and check the total in percentage mode.
Why does removing unfinished work increase my displayed grade?
Removing an ungraded zero changes the included record. The normalized current average then describes completed work only. It does not award the missing marks or guarantee the eventual course grade.
Can I enter GPA points here?
This tool expects percentage scores. Use the GPA calculator for institution-defined grade points and GPA-bearing credits; a percentage-weighted mark and GPA are different measures.
Does the calculator round each assessment contribution?
The calculation retains the underlying values and displays a rounded result. A school that rounds intermediate contributions or applies a special boundary rule may report a different official number.