Final Grade Calculator
Calculate your final grades and find the exam score you need to reach your goal
Final Grade Calculator
Find the exam score you need to reach your target grade, or see how different final exam scores could change your course average.
Compare different exam scores
See how your overall course grade changes with each possible final exam score.
| Exam score | Final course grade | Target status |
|---|
How the calculation works
This calculator assumes your current grade excludes the final exam and that the final is the only graded work remaining.
Exam score needed = [Target grade − Current grade × (1 − Final weight)] ÷ Final weight
On this page: 5 Sections
1. How to Use the Final Grade Calculator
Start by checking your current grade in your gradebook and finding the final exam's weight in your course syllabus. You
can use the calculator to estimate the exam score you need for each class and plan ahead for your finals.
1. Enter Your Current Grade
Under Grade Now, enter your current percentage (88), points earned and possible (176/200), or letter grade (B+). If you
know your exact percentage or points, use those for a more accurate result. When you enter a letter grade, the calculator
uses the midpoint of its percentage range. Adding a class name is optional.
2. Enter the Final Exam Weight
In the Final Weight field, enter the percentage of your overall course grade determined by the final exam. For example,
if your final is worth 20% of your course grade, enter 20.
3.Choose Your Target Grade
Select the letter grade you want to achieve under Goal. The You Need result will show the exam score required to reach
that target. Click + Add Class to plan for additional courses, or select Try Sample Classes to explore an example.
Common Mistake to Avoid
Always enter your current grade before the final exam is included. If your gradebook treats the ungraded final as a zero, the displayed average may be lower than your actual grade so far.
This calculation assumes the final exam is the only graded work remaining. If you still have homework, projects, quizzes, or other tests to complete, those grades can also affect your final course average.
Understanding Your Results
Each class displays its own required exam score under You Need. This helps you identify which finals require the most preparation and set realistic study priorities. When you load the sample classes, you can also see how different current grades, exam weights, and target grades affect the scores you need.
Final Exam Score Planner
Find the exam scores you need to reach your target grades and identify which subjects need the most attention.
| Result Type | Sample | What It Means |
|---|---|---|
| Highest Score Needed | 98% | Biology requires the highest final exam score to reach an A−. Prioritize studying this subject. |
| Minimum Score Required | 87.5% | This is the lowest score needed on the Algebra II final to reach your target grade of B. |
| Target Out of Reach | History | Even a perfect score leaves the final course grade at 77.6%, below a B. Consider a lower target. |
| Already Safe | — | Even a zero on the final keeps the target grade. Check whether the exam must still be taken or passed. |
| Test a Final Score | 70% | See how the same final exam score affects every class. For example, Biology would finish at 84.4% (B). |
Biology: 88%
Algebra II: 81.5%
English: 94%
History: 72%
“Already safe” describes the math. It doesn’t mean you can skip the exam.
2. What Grade Do I Need on My Final Exam?
The exam score you need depends on your current course grade, the percentage of your grade determined by the final, and your desired overall result. For example, if your current grade is 88%, the final exam is worth 20%, and you want to finish with an A− at 90%, you will need to score 98% on the final exam.
The Final Grade Calculator helps you answer common questions as exam day approaches:
. What score do I need on my final to pass the course?
. Can I still earn an A or a B?
. How much will my overall grade drop if I fail the final?
. What will my final course grade be if I score 70%, 80%, or 90% on the exam?
If you don't know your current course average, calculate it first using your assignment scores, earned points, or grading
category weights. Once you have your current grade, you can estimate the exam score needed to reach your goal.
3. How to Calculate the Score You Need on Your Final Exam
Your final course grade depends on your current average and your final exam score, weighted according to how much each contributes to your overall grade. When using the formula, enter grades as percentages and convert the final exam weight into a decimal. For example, a 20% exam weight becomes 0.20.
Formula
Final Course Grade = Current Grade × (1 − Final Exam Weight) + Final Exam Score × Final Exam Weight
Required Exam Score = [Target Grade − Current Grade × (1 − Final Exam Weight)] ÷ Final Exam Weight
Example: Calculate the Required Final Exam Score
Suppose you currently have an 88% in Biology, your final exam is worth 20% of your overall grade, and you want to
finish with an A−, which requires at least 90%.
You can use the formula above to determine the minimum score you need on the final exam to reach your target.
Final Exam Score Breakdown
Calculate how your current grade and final exam contribute to your overall course result.
| Calculation Step | Value A | Value B | Result |
|---|---|---|---|
| Weight Before Final | 1.00 | 0.20 | 0.80 |
| Points Earned Before Final | 88 | 0.80 | 70.4 |
| Remaining Points Required | 90 | 70.4 | 19.6 |
| Required Final Exam Score | 19.6 Points | 20% Weight | 98% |
Verify Your Calculation
Multiply your current grade by its course weight, then add the weighted final exam score.
Conclusion: You need 98% on the final exam to achieve an overall course grade of 90%, assuming the final is worth 20%.
If the required exam score includes decimal places, the calculator rounds it up to the nearest tenth to help you meet
your target mathematically. However, your actual result may vary depending on your instructor’s grading
and rounding policies.
How to Calculate Your Final Course Grade
You can also use the first formula to estimate your overall course grade for a specific exam score. For example, if your
current grade is 88% and the final exam accounts for 20% of your course grade, enter your expected exam score to see
how it affects your final result.
Final Exam Grade Breakdown
Explore how different final exam scores affect your overall course grade and letter grade.
| Final Exam Score | Final Course Grade | Letter Grade |
|---|---|---|
| 0% | 70.4% | C− |
| 50% | 80.4% | B− |
| 70% | 84.4% | B |
| 85% | 87.4% | B+ |
| 100% | 90.4% | A− |
Try a final score under the result does this for every class at once. A failing score and a zero aren’t the same: enter the
score you actually expect.
4. Can I still get an A, B or C?
A goal can be out of reach while the next letter down is still possible. For the Biology example, an 88% before a
final worth 20%, these are the scores you need on the standard scale:
Final Exam Score Goals
Find out what score you need on your final exam to reach your desired course grade.
| Grade Goal | Course Grade | Final Exam Score Needed |
|---|---|---|
| A | 93% |
113%
Out of reach |
| A− | 90% | 98% |
| B+ | 87% | 83% |
| B | 83% | 63% |
| B− | 80% | 48% |
| C+ | 77% | 33% |
| C | 73% | 13% |
| C− or lower | 70% or lower | Already safe |
5.How much does your final exam affect your grade?
The final’s weight decides how far your grade can move. A 30% final has more pull than a 10% one, but even a 10% final can change your letter. Starting from an 88%:
Final Exam Weight Analysis
Compare how different final exam weights affect your course grade and determine what score you need to reach a 90% overall grade.
| Final Weight | Course Grade With a 0% | Course Grade With 100% | Score Needed for 90% |
|---|---|---|---|
| 10% | 79.2% | 89.2% | Out of reach |
| 15% | 74.8% | 89.8% | Out of reach |
| 20% | 70.4% | 90.4% | 98% |
| 25% | 66% | 91% | 96% |
| 30% | 61.6% | 91.6% | 94.7% |
| 40% | 52.8% | 92.8% | 93% |
| 50% | 44% | 94% | 92% |
How the calculation works
Example with a 20% final:
(88 × 0.80) + (98 × 0.20) = 90%
A final exam with a larger weight can have a bigger impact on your overall grade, whether your score is high or low. Keep these factors in mind when calculating the score you need:
Courses graded by points: Calculate the final exam's weight by dividing its points by the total points available in the course, including the final. For example, a 200-point final in a 1,000-point course accounts for 20% of the total grade. If you have earned 704 out of 800 points before the final, enter 704/800 under Grade Now and 20 under Final Weight. If your course uses weighted exam categories, follow the grading method outlined in your syllabus
.Rounding policies: Your instructor's rounding rules can affect the score needed to reach a target. For example, if a grade of 89.5% rounds up to 90%, you may need a lower exam score than if 90% is required without rounding. In the Biology example, this could reduce the required score from 98% to 95.5%. Only rely on this adjustment if your course policy allows it. Some schools, such as Fairfax County Public Schools, have specific rules for rounding final averages.
Dropped or replaced grades: If your final exam replaces a lower test score or your instructor drops the lowest assignment, your current grade may change. Recalculate your average using the updated grading rules before estimating your required exam score. Also, check whether your course requires you to pass the final exam separately, regardless of your overall grade.
Frequently Asked Questions
What grade do I need on my final exam to pass?
The score you need depends on your current course grade, the final exam's weight, and the minimum passing grade. Enter these values into the Final Grade Calculator to estimate the exam score required to pass.
Can I still get an A if I have a B before the final?
Yes, depending on your current percentage and the final exam's weight. If the score needed to reach an A is 100% or less, the goal is mathematically achievable under the calculator's assumptions.
What happens if I get a zero on my final exam?
A zero can significantly lower your overall grade, especially when the final carries a large percentage of the course grade. Use your current grade and exam weight to calculate the result and see how much your average could change.
How much does a final exam affect my overall grade?
The impact depends on the exam's weight. A final worth 40% of your course grade affects your overall result more than one worth 10%. Check your syllabus to find the correct percentage.
What if my final exam replaces my lowest test score?
If your final replaces a previous test or your instructor drops a low score, your current grade and the exam's effect may change. Update your grade based on the course policy before using the calculator.