S

Grades calculator

Semester Grade Calculator

Combine term and exam percentages into a semester grade, then compare two complete-semester scenarios.

TermWeight %Scenario AScenario BRemove
Scenario A88% (B)
Scenario B91% (A)
Difference (B − A)3 points

Compare two complete-semester stories with the same term weights. Blank scores drop out of that scenario only.

FormulaSemester grade = Σ(term score × term weight) ÷ Σ(used weights), compared across two scenarios
Calculation steps
  1. A: Term 1 88 × 40 = 3,520
  2. A: Term 2 92 × 40 = 3,680
  3. A: Exam 80 × 20 = 1,600
  4. Scenario A = 88%
  5. B: Term 1 88 × 40 = 3,520
  6. B: Term 2 92 × 40 = 3,680
  7. B: Exam 95 × 20 = 1,900
  8. Scenario B = 91%
  9. B − A = 3 points

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How it works

How to use this semester grade calculator

  1. List each term or exam with a weight.
  2. Enter Scenario A as the current or cautious path and Scenario B as the alternative.
  3. Read both semester percents, letters, and the point difference.

Formula

The calculation formula

Semester grade = Σ(term score × term weight) ÷ Σ(used weights), compared across two scenarios
01

Enter each term or exam and its share of the semester.

02

Type Scenario A and Scenario B scores for the same weights.

03

Each scenario averages only the terms that have a score, then the page subtracts A from B.

Worked examples

Example calculations

Two terms and an exam

0.40×88 + 0.40×92 + 0.20×80 = 88%. Replacing the exam with 95 gives 91%. The gap is 3 points and moves B to A on a 10-point band.

Blank exam in one scenario

If Scenario A leaves the exam blank, that scenario uses only the completed terms. Scenario B can still include the exam.

When to use it

Common use cases

  • Combine two terms and an exam into one semester percent
  • Compare “keep this exam” with “raise the exam”
  • See whether a better final flips a 10-point letter band

Limits

Assumptions and limits

  • This page combines marking-period percentages, not letter GPAs.
  • Blank scores drop out of that scenario only. They are not treated as zero.
  • Letter bands are A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, F below 60.
  • To solve for one missing exam score, use the Final Grade Calculator.

Questions

Frequently asked questions

How is this different from Final Grade?

Final Grade solves for the exam score you still need. Semester Grade starts from scores you already have (or two what-if sets) and reports both semester results.

How is this different from Weighted Grade?

Weighted Grade is categories inside one course, such as homework and tests. Semester Grade is terms across a marking period, with two scenarios side by side.

Can I model quarters instead of terms?

Yes. Rename the rows Q1–Q4 and set the weights your school uses, including a separate exam row if needed.

Sources

Sources and review