Semester Grade Calculator
Free semester grade calculator: enter Q1, Q2 and final exam with editable 40/40/20 weights. Get your semester percent, letter grade and score needed.
Your semester grade is the number that leaves the gradebook and lands on your transcript. In many US high schools it is built from three pieces: your Quarter 1 percentage, your Quarter 2 percentage, and a final exam, weighted 40 percent, 40 percent and 20 percent. The calculator above takes those three numbers, applies whatever weights your school actually uses, and returns the semester percentage plus the letter grade on the standard 10-point scale. It also runs backwards. If you know the semester grade you need, an 85, a passing 60, whatever the situation is, enter it and the calculator solves for the score required on the component you have not taken yet. That is usually the more useful direction in November or April, when one quarter is locked and the final exam is the only thing left to move. Weights vary by district, so check your syllabus before trusting any default, including ours.
How do I calculate my semester grade?
Multiply each component by its weight and add the results. Under the common 40/40/20 split, semester = 0.40 × Quarter 1 + 0.40 × Quarter 2 + 0.20 × final exam. A student with 88, 82 and 79 gets 35.2 + 32.8 + 15.8 = 83.8, a B. The calculator above does this instantly and converts the result to a letter grade, but check your syllabus first, because your school’s weights may not be 40/40/20.
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Semester Grade Calculator
Key Information
| Parameter | Details |
|---|---|
| Most common US high school split | Quarter 1 40% + Quarter 2 40% + final exam 20% |
| Worked example at 40/40/20 | 88, 82 and a 79 final = 83.8% semester (B) |
| Maximum lift from a perfect final on an 80 quarter average | 4.0 points at a 20% exam weight, 2.0 points at 10% |
| Reverse formula the calculator solves | score needed = (target − points already earned) ÷ (remaining weight ÷ 100) |
Frequently Asked Questions
How do I calculate my semester grade?
Multiply each component by its weight and add the results. Under the common 40/40/20 split, semester = 0.40 × Quarter 1 + 0.40 × Quarter 2 + 0.20 × final exam. A student with 88, 82 and 79 gets 35.2 + 32.8 + 15.8 = 83.8, a B. The calculator above does this instantly and converts the result to a letter grade, but check your syllabus first, because your school’s weights may not be 40/40/20.
What if my school uses 45/45/10 or has no final exam?
Change the weights in the calculator above. They are editable and only need to total 100. For 45/45/10, set the exam field to 10. For a semester with no cumulative exam, set the exam weight to 0 and both quarters to 50, which makes the semester a straight average of the two quarter percentages. Trimester and four-quarter systems work the same way, one weight per term, totalling 100.
Do quarter grades or semester grades count toward my GPA?
In most US high schools the semester grade is what goes on the transcript and converts to quality points, while quarter grades act as progress reports. On a standard unweighted scale an A is 4.0, a B 3.0, a C 2.0 and a D 1.0. This calculator estimates using that standard scale. It cannot know your school’s plus/minus bands, honors weighting or rounding rules, so your registrar’s scale is what is officially recorded.
Are these calculators free to use?
Yes, all calculators on CalcCorp are completely free — no registration, no login, no hidden charges. Results are calculated instantly in your browser and we do not store any of your data.
How accurate are these calculations?
Our calculators use standard financial formulas updated with the latest tax rates, interest rates, and government policies for 2026. Results are accurate for planning purposes but should be verified with a professional for final decisions.
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Last updated: March 2026