Semester Grade Calculator & Final Exam Score Predictor
A semester grade is a weighted mix, not a plain average. Term 1, Term 2, other coursework, and the final exam each count only as much as their weights say they do. This calculator adds the weighted pieces into a projected semester grade when the weights total 100%, and it can also work backward to show the final exam score needed for a target. The default setup follows a common 40/40/20 term/term/final split, but the weights are editable so the answer can match your syllabus.
Reading your result and getting the weights right
The result is only as reliable as the grading weights behind it. Copy the course formula first, then use the calculator as a planning check rather than a replacement for the official gradebook.
The default is 40% / 40% / 20%, but your syllabus wins. Edit the term and final weights before trusting the answer.
Enter percentages, not letter grades or raw points. Convert 38/50 to 76% before entering it.
To solve for the final exam score needed, leave the final exam score blank and enter your target grade.
Curves, drops, retakes, and rounding policies can change the official grade near a cutoff.
Example: final score needed for an 88 semester grade
Maya has an 88 in Term 1, an 82 in Term 2, and a 90 in other coursework. Her course weights are 30%, 30%, 20%, and a 20% final exam. Her completed weighted points are 88 x 30 + 82 x 30 + 90 x 20 = 6,900. To finish at 88, the calculator solves (88 x 100 - 6,900) / 20 = 95. She needs a 95% on the final. If that number had been above 100, she would need extra credit, more remaining weighted work, or a lower target; if it were below 0, the target would already be secure.
Quarter grade vs. semester grade
A quarter or marking period is one piece of the semester, not the same thing as the semester grade. Enter term scores into the term fields only when those are the grades your school uses in the semester formula. Do not drop a single quarter average into a full-semester field unless your gradebook says that is the semester component.
Editable weights and the 40/40/20 default
The default 40/40/20 setup is a starting point: Term 1 40%, Term 2 40%, Final 20%. Many courses use 45/45/10, 30/30/20/20, or a no-final setup. Open the advanced weight fields and copy the exact percentages from the syllabus or LMS. The calculator rejects totals above 100 because that means something has been double-counted.
High school vs. college
The formula is the same in high school and college: score times weight, added together. What changes is the structure. High school courses often use marking periods plus a final, while college courses may weight a few exams or papers heavily. If your course reports letters, convert them to percentages using your school's scale before entering them.
How to read the final-score result
A final score between 0 and 100 is the minimum needed under the weights entered. Above 100 does not mean the calculator failed; it means the target cannot be reached by an ordinary final exam alone. Below 0 means the completed work already carries the target, although school policy can still matter if the final is mandatory.
When another calculator fits better
Use the Grade Calculator when you need a current weighted average across homework, quizzes, tests, projects, and other categories. Use the Final Grade Calculator when your only question is the score needed on one remaining exam or assignment. This semester calculator does not calculate GPA, dropped scores, retakes, curves, or school-specific letter cutoffs.