Weighted Grade Calculator
This weighted grade calculator with final exam shows your current grade and the score you need to reach your target.
Formula & worked example
Formula: Grade = Σ(score × weight) ÷ Σweights. Required final = (target × total weight − points earned) ÷ final weight.
Example: 80% at 30% and 90% at 30%, final worth 40%, target 85%: earned 51 points, required final = (85 − 51) ÷ 0.40 = 85%.
Method & source: Weighted arithmetic mean; required score solves the weighted average for the final. See how we test our calculators.
Next step: try percentage change or a quick maths practice round.
Weighted Grades, Explained
This kind of tool works out your overall grade when some assignments count for more than others. A 20% coursework mark and a 40% final exam do not carry equal weight, so a simple average would mislead you.
This weighted grade calculator with final exam also answers the question every student asks: what do I need to score on the final to reach my target grade?
Working Backwards From a Target Grade
List your graded items with their percentage score and weight, then enter the final exam weight and your target grade.
- Current grade: Your weighted average across the items completed so far.
- Required final score: The mark needed on the final to hit your target overall grade.
- Feasibility: A clear message if the target is out of reach or already secured.
- What-if table: Overall grades for final scores from 50% to 100%.
- Letter grade: A common A–F conversion for reference.
Weights are percentage points of the whole course. If your weights add up to less than 100%, the results are scaled to the weights you entered.
When This Calculation Is Worth Doing
Going into a final exam without knowing what you need can mean either wasted stress or a nasty surprise.
- Set a realistic study target instead of guessing.
- Decide how to split time between courses.
- See whether a grade boundary is still within reach.
- Understand how much each assignment really matters.
- Plan ahead before a retake or resit is needed.
Using it early in the term turns a vague worry into a specific number you can work towards.
Worked walkthrough: reaching an 80
A course is 30% coursework, 30% midterm and 40% final exam. You scored 78 on the coursework and 84 on the midterm. Your points so far are 78 × 0.30 + 84 × 0.30 = 48.6 out of a possible 60, which is a current grade of 81%. To finish with an overall 80, you need (80 − 48.6) ÷ 0.40 = 78.5% on the final. The what-if table shows that a 70 on the final gives 76.6 overall and a 90 gives 84.6. If the required score were above 100, the tool would tell you the target is out of reach.
Entering your grades correctly
- Enter the weights exactly as your syllabus states them. They do not have to add up to 100% – the calculator scales the result to whatever total weight you enter.
- Leave empty rows blank – they are ignored, so you can list only the work that has been graded.
- If your course uses points rather than percentages, convert each score first: points earned divided by points possible, times 100.
- Your school may round or curve grades differently. Use the result as a planning guide and check the official policy.
- Try more than one target grade – knowing the score needed for a 70, 80 and 90 helps you decide where to focus revision.
Why a weighted average is not a simple average
A simple average treats every score equally. A weighted average lets bigger pieces of coursework count for more. Suppose you scored 90 on a quiz worth 10% and 70 on a project worth 90%. The simple average is 80, but the weighted average is 90 × 0.10 + 70 × 0.90 = 72, because the project carries nine times the weight. That is why one big assessment can outweigh a whole term of small tasks.
Finding the score you need on the final
Add up the weighted points you have already earned, subtract them from the overall grade you want, and divide by the weight of the final. As a formula, required score = (target − points earned) ÷ final weight.
Take a course with homework at 20% (you scored 92), a project at 30% (74) and a midterm at 20% (68), leaving a final worth 30%. Your points so far are 18.4 + 22.2 + 13.6 = 54.2, a current grade of 77.4% across the 70% marked. The table shows what each target would demand on the final.
| Target overall grade | Score needed on the final |
|---|---|
| 70% | 52.7% |
| 75% | 69.3% |
| 80% | 86.0% |
| 85% | 102.7% (out of reach) |
Points, percentages and weights
The calculator works with percentages, so convert points first: points earned ÷ points possible × 100. On a course graded by total points, an item’s weight is simply its share of all points, so a 50-point assignment in a 500-point course has a weight of 10%. If your weights add up to less than 100%, results are scaled to the weights you listed, which is useful mid-term when only some items exist.
When the target is out of reach
If the required score is above 100%, the target cannot be reached with the weights you entered. Your options are to aim for the next grade down, look for extra-credit opportunities, or ask whether a retake or resit replaces a low mark. The what-if table for final scores from 50% to 100% shows exactly what each result would give, so you can decide where revision time pays off most.
Letter grades and how schools round
The A–F conversion shown is a common reference scale, but schools set their own cut-offs, may curve results and often round differently, so an 89.6% can be an A at one school and a B at another. Use the result for planning and check your syllabus for the official rules. Percentages from marked work are easy to check with the percentage change calculator.
Frequently Asked Questions (FAQs)
Multiply each grade by its weight, add the results and divide by the total weight. For 80% at 30% weight and 90% at 30% weight, the weighted average is (24 + 27) ÷ 60 = 85%.
Enter your existing grades and weights, the final exam weight and your target grade. The required score is (target × total weight − points earned) ÷ final weight.
Then the target is not achievable with the weights entered unless extra credit is available. The calculator will say so and suggest a lower target.
Not necessarily. The calculator scales results to the total weight of everything you list, including the final exam.
Convert each score to a percentage first (points earned ÷ points possible × 100) and enter that.
Try a couple of likely weights, such as 20% and 30%, from the course syllabus. The required score changes with the weight, so check the syllabus or ask your instructor for the exact figure before relying on one result.
A normal average treats every score equally. A weighted average multiplies each score by its weight, so a 50% exam counts far more than a 10% quiz.
Yes. Add one line per component with its own grade and weight – coursework, midterm and final can each have a different weight, and the calculator totals them all together.
Yes. The current grade is calculated from the work completed so far, before the final is counted.
Check your institution’s policy. This calculator uses the weights and scores you enter and a standard weighted average. Your school or university may round, curve or weight grades differently, and its official calculation always takes precedence. See our full disclaimer.