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Student Calculator

Semester Grade Calculator

Weighted categories4 categories
1
2
3
4
Final semester grade
85.85%B
Letter GradeB
Weight Total100.0%
US letter scale used
A
≥90
B
≥80
C
≥70
D
≥60
F
<60

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What Is a Semester Grade Calculator?

Many classes weight homework, quizzes, midterms, and finals differently. This free semester grade calculator combines those category percentages into one final score and maps it to a standard US letter grade — with a warning if your weights do not add to 100%.

How to Use This Calculator

  1. Name each category to match your syllabus (Homework, Quizzes, Final, etc.).
  2. Enter the weight % and your current grade % for each category.
  3. Add or remove rows as needed — click Add Category for extra sections.
  4. Read your final grade as a percentage and letter (A–F) instantly.

Weighted Grade Formula

Final = Σ(grade × weight) / Σ(weights)

Each category contributes proportionally to its weight. A high grade in a low-weight category matters less than a lower grade in a heavily weighted final.

Worked Example

Homework 92% at 20% weight, Quizzes 85% at 15%, Midterm 78% at 25%, Final 88% at 40%: (92×20 + 85×15 + 78×25 + 88×40) / 100 = 85.65% → letter grade B.

Common Use Cases

  • Tracking semester standing mid-term
  • Calculating what final exam score you need for a target grade
  • Verifying grades against your school's online portal

Frequently Asked Questions (FAQs)

How do you calculate a weighted semester grade?

Multiply each category grade by its weight, sum the products, then divide by the sum of weights: Σ(grade × weight) / Σ(weights).

What if my category weights do not add up to 100%?

The calculator still computes a weighted average and warns you when weights ≠ 100%. Match your syllabus for the most accurate result.

What letter grade scale does this tool use?

A ≥ 90%, B ≥ 80%, C ≥ 70%, D ≥ 60%, F below 60%. Confirm cutoffs with your school — some use plus/minus scales.

Can I add more than four grade categories?

Yes. Click Add Category to create as many rows as your syllabus requires.

How do I calculate what I need on my final exam?

Enter your current grades and weights, then adjust the final exam grade until your overall percentage matches your target.

What is a weighted average grade?

A weighted average gives each category different importance. A 95% quiz worth 10% affects your final less than an 80% final worth 40%.

Does this work for high school and college?

Yes. Any course with percentage-based weighted categories can use this calculator — match names and weights to your syllabus.

Is my grade data stored anywhere?

No. All calculations happen in your browser. Your grades are never uploaded or saved on any server.