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Semester Grade Calculator

Calculate your overall semester grade by combining graded categories — homework, tests, projects, and finals — each with their own weight percentage. Switch to Grade Target to find out exactly what score you need on a remaining assignment to achieve your desired semester grade.

CategoryWeight (%)Score (%)

Semester Grade

84.60%

Letter Grade: B

Total Weight

100.0%

How to Use the Semester Grade Calculator

This calculator computes your overall semester grade from grade categories (homework, tests, projects, finals) each with their own weight percentages. It also includes a Grade Target tab that tells you the exact score you need on a remaining assignment to finish the semester at your desired grade.

In the Calculate tab, enter each grade category from your syllabus, its weight (%), and your current score (%). All weights should sum to 100%.
Your semester grade appears instantly and updates as you type.
Switch to Grade Target to see your completed grades summarized, then enter the name and weight of a remaining assignment and your target grade. The calculator tells you exactly what score you need.
Use Share to copy a bookmark-friendly URL with your inputs.

Semester Grade Formula

Semester Grade = Σ(Category Score × Category Weight) ÷ Σ(Weights)

Example (weights sum to 100%):
Homework (20%): 88 × 0.20 = 17.60
Tests (30%): 84 × 0.30 = 25.20
Project (20%): 92 × 0.20 = 18.40
Final (30%): 78 × 0.30 = 23.40
─────────────────────────────
Total = 84.60 ÷ 1.00 = 84.60% → B

Grade Target Formula

When you want to know the score needed on a remaining assignment to achieve a target semester grade, the formula is:

Score Needed = (Target Grade × Total Weight − Completed Weighted Sum) ÷ Remaining Weight

Example: Current avg 87% on 70% of grade, want final semester grade of 90%, final exam = 30%
Score Needed = (90 × 100 − 87 × 70) ÷ 30 = (9000 − 6090) ÷ 30 = 2910 ÷ 30 = 97.0%

Typical Semester Grade Breakdown

College course example: Homework 20% | Tests & Quizzes 30% | Lab/Project 20% | Final Exam 30%

High school example: Daily Work 25% | Quizzes 20% | Tests 35% | Semester Exam 20%

Always check your syllabus for the exact breakdown — it varies by teacher and institution.

What Does "Grade Not Possible" Mean?

If the Grade Target calculator shows a needed score above 100%, it means the target semester grade is mathematically unachievable given your current scores and the remaining assignment's weight. To reach that target, you would need extra credit or a different strategy. If it shows a negative needed score, congratulations — you've already secured the target grade regardless of what you score on the remaining work.

Grade Scale Reference

A+ 97–100 | A 93–96 | A- 90–92 | B+ 87–89 | B 83–86 | B- 80–82
C+ 77–79 | C 73–76 | C- 70–72 | D+ 67–69 | D 63–66 | D- 60–62 | F 0–59

Frequently Asked Questions

A semester grade calculator computes your overall grade for a single semester by combining multiple graded categories — homework, tests, projects, and a final exam — each weighted by their percentage contribution to the final grade. It uses the weighted average formula and is essential when your course has several distinct graded components with different levels of importance.

For categories you haven't completed yet, use the Grade Target tab rather than entering a zero in the Calculate tab. In the Calculate tab, only enter scores for completed work. Then switch to Grade Target and enter the remaining category's weight and your target grade to find out what score you need.

Add the semester exam as its own category row with its weight percentage. For example, if the semester exam is 20% of your grade, add a row: "Semester Exam | Weight: 20% | Score: (enter your score after you take it)." Before taking the exam, use the Grade Target tab to calculate what score you need on it.

This calculator handles one course at a time. For multiple courses, use it separately for each course, or use our Cumulative GPA Calculator to combine final grades across all your courses into an overall semester or cumulative GPA.

Some syllabi list rounded percentages that may not add to exactly 100 (e.g., 33% + 33% + 34% = 100%). Our calculator handles this correctly by dividing by the actual total weight. If your weights genuinely don't sum to 100 due to an error, check your syllabus or ask your professor — many professors have a small discretionary category that accounts for the remaining percentage.

A semester grade (this calculator) computes the overall percentage grade within a single course for one semester. A cumulative GPA combines letter grades from all courses across all semesters, weighted by credit hours, into a single number on the 4.0 scale. Use our Cumulative GPA Calculator to combine semester grades into an overall GPA.