Final Grade Calculator

Use this final exam calculator to easily calculate the final grade or score you need to achieve in order to get a desired overall score for a class or course. To calculate what you need on your final, you need to know your current grade and the weight of the final exam as a percentage of the overall grade.

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  1. How much do you need to get on your final exam
  2. How will the final affect your grade
  3. How to convert a letter grade to percentage

    How much do you need to get on your final exam

When the end of the year, semester, or course approaches, students often want to find out what grade they need on their final exam in order to get a desired class or course grade. The final grade calculator can tell you what is the minimum you need to score on your final to achieve the target overall grade such as a passing grade. It does so using simple arithmetic, as explained below.

The minimum that is needed on the final can be calculated using the following formula:

Final exam grade = (Target Grade - Current Grade x (100% - Weight of Final(%))) / Weight of Final(%)

To use the calculator, you have to know:

  • your current course grade
  • the weight of the final exam in the overall scoring of the course or class
  • your overall grade goal

If you do not know your current weighted average grade, then use our grade calculator first.

    How will the final affect your grade

The higher the weight of the final exam, the more the question of what grade you need on your final matters. The exact effect of the final exam score on the overall grade for a school class or college course depends both on the score and on its weight towards the overall grade.

For example, if you get a high score, but the final has a weight of just 20% of total, then it will have an impact two times smaller than if it was weighted at 40%. Similarly, if it is highly weighted, say at 50%, and you get a lower score on it than your exams through the semester, it will drag your overall grade down much more than if it was weighted at 20% or 30%.

    How to convert a letter grade to percentage

In case you only know your current weighted grade as a letter grade and not a percentage, you will need to convert it to a percentage before you can calculate the minimum score you need to get on your final. The table below can help with that, but ideally you would want to know the exact percentage grade as otherwise results from this calculator will only be approximate.

Converting letter grades to percentages
Letter GradePercentageGPA
A+ 97-100% 4.3
A 93-96% 4.0
A- 90-92% 3.7
B+ 87-89% 3.3
B 83-86% 3.0
B- 80-82% 2.7
C+ 77-79% 2.3
C 73-76% 2.0
C- 70-72% 1.7
D+ 67-69% 1.3
D 63-66% 1.0
D- 60-62% 0.7
F 0-59% 0.0

The above table presents a grading system used by some colleges in the United States, but it is by no means universally applied. You need to check with your local school or college in case you need to convert between letter grades and percentages with sufficient accuracy.

    Cite this calculator & page

Cite results from this online calculator or information on this page by choosing a citation format:

Georgiev, G.Z. (n.d.) Final Grade Calculator. GIGAcalculator.com. Retrieved Jun 20, 2026, from https://www.gigacalculator.com/calculators/final-grade-calculator.php