# Points / Questions ❔
# Wrong ❌
# Correct ✔️

If you're looking for a tool which can help you in setting a grading scale, this test grade calculator is a must. Also known as test score calculator or teacher grader, this tool quickly finds out the grade and percentage on the basis of the number of points and wrong (or correct) answers. Moreover, you can change the default grading scale and set your own one. Ar you still wondering how to calculate test score? Scroll down to find out - or simply experiment with this grading scale calculator.

If this test grade calculator is not the tool you're exactly looking for, check out our other grading calculators like the high school GPA calculator with many weighting options, as well as the complementary college GPA calculator. Also, you may find the final grade tool useful to check what your final grade will be - or what you can do to improve it.

How to calculate test score

To calculate the percentile test score, all you need to do is divide the earned points by the total points possible. In other words, you're simply finding the percentage of good answers:

percentage score = #correct / #total

As #correct + #wrong = #total, we can write the equation also as:

percentage score = (#total - #wrong) / #total

Then, all you need to do is convert the percentage score into a letter grade. The default grading scale looks as in the table below:

Letter Grade Percentile
A+ 97-100
A 93-96
A- 90-92
B+ 87-89
B 83-86
B- 80-82
C+ 77-79
C 73-76
C- 70-72
D+ 67-69
D 63-66
D- 60-62
F Below 60

If you don't using the +/- grades, the scale may look like:

  • An A is 90% to 100%
  • A B is 80% to 89%
  • A C is 70% to 79%
  • A D is 60% to 69%
  • and finally an F is 59% and below - and it's not a passing grade

Above you could find the standard grading system for US schools and universities. However, the grading may vary among schools, classes and teachers. Always check beforehand which system is used in your case.

Sometimes the border of passing score is not 60%, but e.g. 50 or 65%. What then? We've got you covered - you can change the ranges of grades! Read more about it in the last paragraph of this article: Advanced mode options.

Test grade calculator - how to use it?

Our test score calculator is a straightforward and intuitive tool!

  1. Enter the number of questions/points/problems in the student's work (test, quiz, exam - anything). Assume you've prepared the test with 18 questions.

  2. Type in the number the student got wrong. Instead - if you prefer - you can enter the number of gained points. Let's say our exemplary student failed to answer three questions.

  3. Here we go! Teacher grader tool is showing the percentage and grade for that score. For our example, the student got a score of 83.33% from a test, which corresponds to B grade.

  4. Underneath you'll find a full grading scale table. So to check the score for the next students, you can type in the number of questions they've got wrong - or just use this neat table.

Test grade calculator - advanced mode options

That was a basic version of the calculations. But our teacher grader is a much more versatile and flexible tool! You can choose more options to customize this test score calculator. Just hit the Advanced mode button below the tool, and two more options will appear:

  1. Increment by box - here you can change the look of the table which you get as a result. The default value is 1, which means that the student can get an integer number of points. But sometimes it's possible to get, e.g. half-points - then you can use this box to declare the increment between next scores.

  2. Percentage scale - in that set of boxes, you can change the grading scale from the default one. For example, assume that the test was really difficult and you'd like to change the scale so that getting 50% is already a passing grade (usually it's 60% or even 65%). Change the last box Grade D- ≥ value from default 60% to 50% to reach the goal. You can also change the other ranges if you want to.

And what if I don't need +/- grades? Well, then just ignore the signs :)

Hanna Pamuła - PhD candidate.

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Test Grade Calculator for Teachers (and Students). Convert Points to Percentages and Grades