Grade calculator
Weighted course grade, and the score you need on the rest.
Formula
Course percent
percent = (p1×w1 + p2×w2 + …) / (w1 + w2 + …)
A letter is turned into the percent shown in the row, and the average is divided by the weights that were entered.
A letter stays a percent. B is 85 on the untouched 93-scale, and the average is divided by the weights that were entered.
What you need
needed = (target × total − graded points) / remaining
Graded points means each row's percent times its weight, and total is graded weight plus remaining weight. When the needed score is over 100, the finish at 100 is (graded points + 100 × remaining) / total.
Examples
Example 1. Grade so far
90% at weight 20, 80% at weight 30, and 88% at weight 20. Graded weight is 70.
90×20 + 80×30 + 88×20 = 5960
5960 ÷ 70 = 85.1
(90×20 + 80×30 + 88×20) / 70 = 85.1
85.1% is a B on the 93-scale (B is 83–86). The letter moves if the syllabus uses different cutoffs. 70% of the course is graded.
85.1 is the grade so far because only 70 of the weight is filled in, and the letter can change if the cutoffs are edited.
Example 3. The final
Current grade 88, target 85, final worth 40.
(85 − 88×0.6) / 0.4 = 80.5
You need 80.5% on the final.
Current grade 70, target 95, final worth 10.
(95 − 70×0.9) / 0.1 = 320
You would need 320% on the final.
A 100 on the final finishes the course at 73%.
80.5 is the score on the final, and 320 is shown with 73 because a perfect final still finishes the course at 73.
93-scale
This is the table printed on calculator.net, not the US standard. A+ on this table is 4.3.
| Letter | GPA (reference only) | Percentage |
|---|---|---|
| A+ | 4.3 | 97–100% |
| A | 4 | 93–96% |
| A− | 3.7 | 90–92% |
| B+ | 3.3 | 87–89% |
| B | 3 | 83–86% |
| B− | 2.7 | 80–82% |
| C+ | 2.3 | 77–79% |
| C | 2 | 73–76% |
| C− | 1.7 | 70–72% |
| D+ | 1.3 | 67–69% |
| D | 1 | 63–66% |
| D− | 0.7 | 60–62% |
| F | 0 | 0–59% |
Your syllabus wins. Edit the cutoffs above.
The same steps, with a weighted average set next to an equal average, are written out in How to Calculate Your Final Grade.
45/50 and similar questions are on the percentage calculator.
How to use the grade calculator
Use this final grade calculator to find your course percent from the work you already have, and the score you still need on a final exam. You can type points, a percent, or a letter, plus a weight for each part of the class.
- Each row is one part of the class, such as homework or a test. Use Add row for another line.
- Type what you earned. If that value is already a percent, or a letter such as B, leave Possible blank. If it is points, also type the points possible.
- Type each weight with the same kind of number your teacher uses. If the other weights add toward 100, a final worth 30% is 30, not 0.30.
- To see the score you still need, type a target percent and the remaining weight. The remaining weight is the final, or any work you have not done yet.
- The result updates as you type. Calculate runs the same check. Match the weights to your syllabus before you trust the letter.
What is a final grade?
A final grade here is the percent for the whole class. It can include homework, quizzes, projects, tests, and a final exam. Your teacher decides how much each part counts. The syllabus is the list to follow.
What is a weighted grade?
A weighted grade means some parts count more than others. Homework might be weight 20, tests weight 50, and the final exam weight 30. A high score on a large weight moves the course percent more than the same score on a small weight.
Weighted grade example
Homework 90, tests 80, and a final exam 70, with those weights 20, 50, and 30. Leave Possible blank, because these are already percents.
90×0.20 + 80×0.50 + 70×0.30 = 79.0
The page shows 79.0%, which is a C+ on the untouched 93-scale (C+ is 77–79). Your class may use different weights and different cutoffs.
What grade do I need on my final?
You need three numbers: the grade so far, the weight of the work still left, and the course percent you want. Type the grade so far on a row, the goal in Target percent, and what the final is worth in Remaining weight. Use the same units as the row weights.
Example: the score for an 85% course grade
Your work so far is 82, and that work is weight 75. The final is weight 25. You want an 85.
(85 − 82×0.75) / 0.25 = 94
You need 94% on the final. If the score you need is over 100, the page also shows the course percent a perfect 100 would reach. Example 3 above is that case. If the score you need is under 0, the grades already entered are enough for that target.
What grade do I need on my final to pass?
This page does not pick a passing grade for you. A class might call 60, 70, or another number a pass. Type the number your teacher uses as the target percent, then type the final’s weight. The page shows the score you need for that target.
Grades from points
Some classes use points instead of category weights. Type points earned and points possible. If every row is points and you leave every weight blank, the page adds the points and turns them into a percent.
(45) / (50) = 45/50 = 90.0
The page shows 90.0% and the note “Weighted by points possible.” If a part also has a weight, fill that weight too. A single “what percent is this” question is on the percentage calculator, linked above.
Two grades and a final exam
You can type two parts, such as two quarters, and then the final. Quarter 1 is 84 at weight 40. Quarter 2 is 88 at weight 40. The final is the remaining weight, 20. The target is 85.
(85 × 100 − 6880) / 20 = 81
You need 81% on the rest of the course. With more than one graded row, the page says “on the rest.” That rest is the final when the final is the only work left. Use the weights on your own syllabus if they are not 40, 40, and 20.
High school and college classes
The same boxes work for a high school class or a college class. There is no separate college setting. Type the points and weights from that course.
Common mistakes
- Using weights that do not match the syllabus.
- Typing 0.30 in Remaining weight when the other weights are 20 and 50. Use 30 so the units match.
- Filling Possible when Earned is already a percent, or leaving Possible blank when Earned is points.
- Forgetting that a final exam is only the remaining weight, not the whole course.
- Assuming every school uses the same passing grade or the same letter cutoffs. Edit the 93-scale if your class differs.
Questions
Is this grade calculator free?
Yes. The page does not ask you to pay.
Can I use it for a college course?
Yes. Enter the weights and scores from that course. Check the syllabus first. The page does not have a separate college calculator.
Can I calculate a final exam grade from points?
Yes, when you know points earned and points possible. Leave the weights blank if the class is graded only by points. If each part also has a weight, fill the weight as well.
How do I find the grade I need on the final?
Type the work you have finished, your target percent, and the remaining weight. The Formula section shows the equation the page uses.
What if the score I need is over 100%?
The page still shows that score, and it shows the course percent you would have with a 100 on the remaining work. Check the numbers you typed. This page does not add extra credit.
Does this calculator find my GPA?
No. The 93-scale lists a GPA number next to each letter, but that number is not used in the course percent. The page does not combine several classes or credit hours into a GPA.
Can I use this for a semester grade?
Yes, if you know the weight of each part of the semester. There is no separate semester button. Enter those weights on the rows.
Does every school use this letter scale?
No. The table on this page is one 93-scale, not a rule for every school. Your syllabus wins. You can edit the cutoffs above.
A reminder
The calculator can show the percent, the letter, and the score you still need. It cannot know your teacher’s rules. Use the scores and weights from your syllabus. If a number is unclear, ask your teacher.