This grade calculator works out your current grade in a class from your assignment and test scores. Enter scores with the weights from your syllabus, or simply points earned and points possible, and you get the grade as a percentage and a letter. If part of the course is still ahead, it also shows the lowest and highest final grade you can still end up with.
How to use the grade calculator
- Choose Weighted if your syllabus gives each category a percentage of the grade, or Points if your grade is total points earned over total points possible.
- Add one row per assignment or category. In Weighted mode enter the score in percent and the weight in percent; in Points mode enter points earned and points possible. Naming the row is optional.
- Pick a letter scale: A–F with plus and minus grades, or the simple A/B/C/D/F scale.
- Read your grade. Each row also shows how many percentage points it adds to the grade and how many it costs you.
How the grade is calculated
Weighted grade = Σ (score × weight) ÷ Σ weights
If the weights you enter add up to less than 100%, the result is your grade so far. The calculator then adds a range: the minimum assumes 0% on the remaining weight, the maximum assumes 100%. If they add up to more than 100%, you’ll see a warning, since that usually means a typo or a syllabus with extra credit. To work out the exact score you need on the final exam to reach a target grade, use the final grade calculator.
Points grade = Σ points earned ÷ Σ points possible × 100
Each assignment counts in proportion to how many points it is worth, so a 100-point exam matters five times as much as a 20-point quiz.
Letter grade scales
Cut-offs are not universal: each school or teacher sets its own. The calculator offers two common US scales and gives the letter for the exact percentage, without rounding.
| Letter | A–F with + and − | Simple A–F |
|---|---|---|
| A | 93–100 | 90–100 |
| A- | 90–92.99 | — |
| B+ | 87–89.99 | — |
| B | 83–86.99 | 80–89.99 |
| B- | 80–82.99 | — |
| C+ | 77–79.99 | — |
| C | 73–76.99 | 70–79.99 |
| C- | 70–72.99 | — |
| D+ | 67–69.99 | — |
| D | 60–66.99 | 60–69.99 |
| F | below 60 | below 60 |
The plus/minus scale follows the undergraduate grading policy of Sacred Heart University; the A, B and C bands of the simple scale match College Board’s 4.0 conversion guide, with the D/F line at 60. If your syllabus prints a different table, trust the syllabus.
Examples
Weighted, course in progress. Homework 92% (weight 20%), quizzes 85% (30%), midterm 78% (25%). That is 1,840 + 2,550 + 1,950 = 6,340 over a total weight of 75, so the current grade is 6,340 ÷ 75 = 84.53%, a B. The final exam, worth 25%, is still open: with 0% on it you’d finish at 63.40% (D), with 100% at 88.40% (B+).
Points. Quizzes of 45/50, 18/20 and 27/30 give 90 out of 100 points, so the grade is 90.00%, an A- on the plus/minus scale and an A on the simple scale.
Common mistakes
- Averaging categories without weights. A plain average of 92, 85 and 78 is 85, but the weighted grade above is 84.53, because the low midterm carries more weight than homework.
- Mixing modes. Don’t enter points as percentages or weights as points. Pick the mode that matches how your teacher grades.
- Treating the grade so far as final. While weights are below 100%, the grade can still move anywhere inside the range shown.
- Assuming the cut-offs. A 92% is an A- on one scale and an A on another. Choose the scale your class uses.