Grade Calculator
Enter what you scored and what it was out of, one row per assignment, and the percentage and the letter move as you type. Nothing else is required: no weight per category before it will show a number, and no school's scale picked silently on your behalf. The scale is a control you set, its bands are printed under the tool, and switching between plus/minus and whole letters changes every figure on the page at once. Weighted mode is one toggle away when a course grades by category, and weights that do not add up to 100 are normalised with a line saying so. It runs entirely in this tab: nothing is uploaded and no account is asked for.
89.64% (B+) from 493 of 550 points on the plus / minus scale.
One row per assignment: points earned over points possible. Press Enter in any field to add another line.
Worked examples
Each one runs through the same code the page above does, on the plus / minus scale, so switching the scale moves them too.
The scale in use
Every band includes its own floor and runs up to the next one, so 89.99% is a B+ and 90% is an A-. Nothing is rounded on the way to a letter.
| Letter | Percentage band |
|---|---|
| A+ | 97% and above |
| A | 93% up to 97% |
| A- | 90% up to 93% |
| B+ | 87% up to 90% |
| B | 83% up to 87% |
| B- | 80% up to 83% |
| C+ | 77% up to 80% |
| C | 73% up to 77% |
| C- | 70% up to 73% |
| D+ | 67% up to 70% |
| D | 63% up to 67% |
| D- | 60% up to 63% |
| F | 0% up to 60% |
Common questions
- What is the difference between a points grade and a weighted grade?
- A points grade adds every point earned and divides by every point possible, so a big assignment counts more simply because it is worth more points. A weighted grade averages category percentages by the share of the final grade each category is worth, so a category counts exactly as much as the syllabus says regardless of its size. They are genuinely different numbers. A 10-point quiz scored 10 out of 10 with a 200-point exam scored 160 out of 200 is 170 out of 210, which is 80.95% and a B-. The same two scores weighted at half each are 90.00% and an A-. Use the mode your syllabus describes, and if it says a percentage next to each category, that is the weighted mode.
- How do I work out my grade if the lowest score is dropped?
- Remove that row, because this calculator never drops one for you. Take a term of 178 of 200, 88 of 100, 82 of 100, 145 of 150 and a pop quiz of 2 of 20: that is 495 of 570, or 86.84%, a B. Remove the pop quiz with the Remove button beside it and the total becomes 493 of 550, which is 89.64% and a B+. Doing it by hand is deliberate, because which score is dropped, and whether the policy exists at all, is a syllabus question this page cannot see.
- How do I set a plus and minus scale?
- The Scale control has two settings. Plus / minus is the common A+ to F scale with A+ at 97, A at 93, A- at 90, B+ at 87 and so on down to D- at 60. Whole letter drops the plus and the minus, so A starts at 90, B at 80, C at 70 and D at 60. The full band table sits under the calculator and redraws when you switch, so the letter you are shown can always be checked against the numbers it came from. If your course uses bands that are not on either scale, read the percentage instead of the letter: the percentage is the part that is exact.
- Is anything I enter uploaded?
- No. The arithmetic runs in the page, in your browser, and no assignment name, score or total leaves the device. Your rows, your categories, the percentage box and your scale choice are kept in this browser's own storage so the tool is still filled in when you come back, and that copy never travels either. Clearing your browser data clears it. There is no account and no sign-in.
- What percentage is an A?
- On the plus/minus scale here, 93% up to 97% is an A, 90% up to 93% is an A-, and 97% and above is an A+. On the whole-letter scale, 90% and above is an A with no minus. Those are common United States conventions rather than a rule, which is why the table is on the page and the scale is a control rather than an assumption. A school that puts an A at 94, or that uses a 7-point scale, is not doing anything unusual.
- Does 89.5% round up to an A minus?
- Not here. A band includes its own floor and runs up to the next one, so 89.99% is a B+ and 90% is an A-. Nothing is rounded on the way to a letter, because rounding is a rule that belongs to a syllabus and a professor, not to a calculator that has never read either. The percentage itself is shown to two decimals, and the line under it tells you how many more points would reach the next letter: from 493 of 550, two more points make it 495 of 550, 90.00% and an A-.
- Do the weights have to add up to 100?
- No. Weights are normalised by their own total, so entering a homework category worth 30 and an exam worth 60 gives 83.33% rather than refusing, and the line under the result says the weights add up to 90, not 100, and that each is scaled by 100 ÷ 90. That is what you want mid-term, when only part of the course has been graded: it is the average of what has actually happened so far. A weight of 0 across every category is the one case that has no answer, and it says so.
Exact arithmetic on the points you enter, against the scale you choose. It cannot know your school's rounding rule, a dropped lowest score or extra credit, so set the scale and check the syllabus before you read the letter.