Final Grade Calculator

To find the score you need on your final exam, subtract your current grade multiplied by its weight from your target grade, then divide that result by your final exam weight. For example, if you have an 85% in a class, want a 90% overall, and the final exam is worth 20%, you need a 110% on the final. Enter your current grade, target score, and exam weight below to calculate your required grade instantly.

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Your current grade before the final exam

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The final grade you want to achieve in the course

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What percentage of your final grade is the final exam worth?

Results

Enter your information to see what grade you need on your final exam

How to Calculate What You Need on Your Final Exam

Finding your required final exam score takes three simple pieces of information: your current class percentage, your target final class grade, and the percentage weight assigned to the final exam. When teachers calculate overall grades, they use a weighted average system. Every major category, like homework, quizzes, midterm exams, and projects, counts for a specific fraction of your overall score.

If you want to track your academic performance throughout the entire semester, you can use a weighted grade calculator to combine all your assignment scores.

Once you know the combined total of your existing coursework, you can figure out how much weight the final exam holds. Subtracting the final exam weight from 100% gives you the percentage weight of all your current work. You then multiply your current percentage by that remaining weight, subtract that product from your goal, and divide the remaining number by the final exam percentage weight.

The Step by Step Final Grade Formula

The mathematical formula works by isolating the unknown variable, which is your final exam score:

Required Score=Target Grade−[Current Grade×(1−Final Exam Weight)]Final Exam Weight\text{Required Score} = \frac{\text{Target Grade} - [\text{Current Grade} \times (1 - \text{Final Exam Weight})]}{\text{Final Exam Weight}}

For example, if your current grade is 85%, your goal is 90%, and your final exam is worth 20% of your grade (0.20), you need a 110% on the final exam.

Here is the exact equation broken down into steps:

  1. Convert your final exam weight from a percentage to a decimal by dividing it by 100.
  2. Subtract that decimal from 1 to find the decimal weight of your current work.
  3. Multiply your current class grade by the decimal weight of your current work.
  4. Subtract that result from your desired target overall grade.
  5. Divide the number you get by the final exam decimal weight.

Example Final Score Calculations

Here are three common scenarios students face at the end of a semester.

Scenario A: Reaching an A Grade

  • Current Grade: 88%
  • Desired Class Grade: 90%
  • Final Exam Weight: 20% (0.20 in decimal form)
Calculation:
1. Current work weight = 1 - 0.20 = 0.80
2. Current contribution = 88 * 0.80 = 70.4
3. Remaining points needed = 90 - 70.4 = 19.6
4. Required final exam score = 19.6 / 0.20 = 98%

You need a 98% on the final exam to secure an A grade.

Scenario B: Maintaining a B Grade

  • Current Grade: 83%
  • Desired Class Grade: 80%
  • Final Exam Weight: 15% (0.15 in decimal form)
Calculation:
1. Current work weight = 1 - 0.15 = 0.85
2. Current contribution = 83 * 0.85 = 70.55
3. Remaining points needed = 80 - 70.55 = 9.45
4. Required final exam score = 9.45 / 0.15 = 63%

You need a 63% on the final exam to keep a B grade.

Scenario C: Heavy Final Exam Weight

  • Current Grade: 79%
  • Desired Class Grade: 80%
  • Final Exam Weight: 40% (0.40 in decimal form)
Calculation:
1. Current work weight = 1 - 0.40 = 0.60
2. Current contribution = 79 * 0.60 = 47.4
3. Remaining points needed = 80 - 47.4 = 32.6
4. Required final exam score = 32.6 / 0.40 = 81.5%

You need an 81.5% on the final exam to reach your B target.

How to Handle Point-Based Classes

Not every class uses weighted percentages. Some courses use a total points system where every assignment, quiz, and test is worth a specific number of points. To calculate what you need on a final exam in a point based class, you do not need percentage weights.

First, add up all the points you have earned so far. Next, add up all the total possible points available before the final exam. Finally, add the maximum possible points of the final exam to your total possible points to find the class total.

Multiply your desired final grade percentage by the total points possible in the class. That gives you the total number of points you need to earn overall. Subtract the points you have already earned from that total number. The remaining total is the exact number of points you must score on the final exam.

If you are trying to understand how individual assignment points affect your letter grade, check our guide on test grade calculator methods to see percentage breakdowns per quiz or exam.

Final Grade Calculation for Special Cases

Class grading schemes can sometimes be more complex than simple weights or points. Teachers often use special rules that change how your final score is calculated.

What if My Lowest Test Grade is Dropped?

When a teacher drops your lowest test grade, your current overall average before the final exam will likely increase. First, remove your lowest test score from your records and recalculate your current grade using only the remaining tests and assignments. Input that new, higher current grade into the calculator to get an accurate requirement for your final exam.

What if the Final Exam Replaces a Low Score?

Some professors allow your final exam score to replace your lowest midterm score if you score higher on the final. In this case, the final exam carries double value. It counts for its own weighted percentage and also boosts your past test category average. This lowers the percentage score you need on the final exam to raise your overall grade.

Converting Final Scores to GPA

Once you complete your final exams, your final percentage grades convert into letter grades and grade point values. If you want to see how your new class grades impact your overall academic record, you can enter your results into our GPA calculator to find your high school or college cumulative GPA.

Frequently Asked Questions

What if the calculated score I need is over 100%?

If the calculator shows you need a score higher than 100%, it means it is mathematically impossible to reach your target grade with regular scoring. You will either need to earn extra credit or lower your target class grade.

What if the calculator says I need a negative score?

A negative score means you have already locked in your target grade. Even if you score a zero on the final exam, your current points are high enough to keep you at or above your goal.

How do I calculate my grade if I already took the final exam?

If you already took the exam, multiply your current grade by its weight, multiply your final exam score by the final exam weight, and add those two numbers together. That sum is your final overall class percentage.

What is a passing grade on a final exam?

A passing grade depends on your school or teacher. Usually, a score of 60% or 65% is considered the minimum passing mark, which corresponds to a D letter grade.

Does a final exam always cover the whole semester?

Not always. A cumulative final exam covers all topics from the entire term. A non cumulative final exam only tests material covered after the previous midterm exam.

What percentage of my grade should a final exam be?

Most high school and college final exams are worth between 10% and 30% of the total course grade. Heavy exam courses, such as college law or science classes, may weigh the final exam at 40% or 50%.

How does extra credit affect my final grade calculation?

Extra credit adds points directly to your earned points total or increases your current grade percentage. Add your extra credit points to your overall grade before calculating what you need on the final exam.