Math & calculatorsFree
Free grade percentage calculator. Convert points earned vs points possible into a percentage and letter grade.
Last updated 18 October 2026
This calculator still works and nothing here has been taken away. We publish the fuller version of this topic on our student site, the grade percentage calculator on MyCampusKit, so one page carries the subject properly instead of two saying the same thing more thinly.
The percentage is the points you earned divided by the points possible, times 100, shown to two decimals. The letter comes from a fixed five-step scale: 90 and above is A, 80 B, 70 C, 60 D, and below 60 F. There are no plus or minus grades. It updates as you type.
Measured: the default 87 out of 100 is 87.00% and a B; 2 out of 3 is 66.67% and a D; 1 out of 3 is 33.33% and an F; 93 out of 100 is an A.
The page picks the letter from the exact percentage and only then rounds it for display, so 44.999 out of 50, which is 89.998%, is a B even though it would round to 90.00%. To stop the number contradicting the letter beside it, the page shows four decimals near a boundary, cut rather than rounded: that score shows as 89.9980%, letter B, and 89.99996 out of 100 shows as 89.9999%.
Until 18 October 2026 those four decimals were rounded, so in the last 0.00005 below a boundary the page printed, for example, "90.0000% · letter B". That has been corrected and is now covered by a test.
Schools set their own cut-offs and their own letters, and this page uses only one simple version. Two examples of how far apart they are:
So the same score can carry different letters on the two sites: 92% is an A here and an A- there, and 87.5% is a B here and a B+ there. Your syllabus is the only scale that counts for your course.
This page divides one total by another, which is right when every point counts the same. Many courses instead weight categories, such as homework 20% and exams 80%, and then pooling the points gives the wrong answer. A worked example:
Same work: a B one way and a C the other. If your syllabus lists category weights, work out each category's percentage here, then combine them by weight. MyCampusKit's final grade calculator handles the weight of a final exam.
Every behaviour and every value on this page was measured against this tool as it is published, in a browser, on 18 October 2026.
Points earned divided by points possible, times 100. So 43 out of 50 is 86% and 87 out of 100 is 87%. The page shows two decimals, and four near a letter boundary so the number cannot contradict the letter.
A B on this page, which uses 90 for an A and has no plus grades. On a plus and minus scale it is often a B+. Whether 89.5 is rounded up to an A is your teacher's or school's policy, not something this page decides.
Near a boundary, two decimals could print 90.00% beside a B. So when rounding would cross a boundary, the page shows four decimals, cut rather than rounded: 44.999 out of 50 shows as 89.9980%.
Yes. Extra credit is accepted and nothing is capped, so 110 out of 100 shows 110.00% and an A. Negative points earned and zero points possible are rejected with "Enter valid points."
Only for one category at a time. Adding every point together ignores the weights: in our example, pooled points gave 87.5% while the 20/80 weighting gave 79%. Work out each category here, then multiply each by its weight and add.
It uses plus and minus grades, with 93 for an A and 90 for an A-, where this page uses a plain 90 for an A. 92% is an A here and an A- there. Your syllabus decides which applies to you.
Yes. Enter any totals, such as 17 out of 20 or 412.5 out of 450, including decimals. The percentage is always earned divided by possible, whatever the total is.
No. The calculation happens in your browser and nothing is uploaded. Each visit starts again from the default 87 out of 100.