What letter grade scale does the Easy Grader use by default?

The default scale is the most common US K-12 and university scale: 90 percent and above is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and anything below 60 is an F. This calculator lets you change every threshold and every letter label, so it also handles plus or minus scales (A plus, A, A minus), the IB seven-point scale, pass or fail systems, and custom institutional rubrics. Whatever five-band scale you set is applied to every row of the printable grid, so the printout matches what you actually use in your gradebook.

Can I print the grading grid to keep on my desk?

Yes. Click the Print button at the top right of the tool and your browser opens the standard print dialog. The printed page shows only the grading grid itself; the surrounding website chrome, sidebars, and ads are hidden by print-specific CSS. The grid prints in a single column when the question count is small and in two columns for longer tests so it fits on one sheet of paper. Teachers commonly print one grid per test length they use most often (10, 20, 25, 30, 50 question quizzes) and tape them inside the cover of their gradebook for instant lookup during grading.

Does the Easy Grader handle partial credit or weighted questions?

The standard EZ-Grader chart assumes every question is worth one point, which works for most multiple-choice quizzes, vocabulary tests, and basic skills assessments. For tests with partial credit or weighted questions, switch to single-score mode and enter the total points possible (not the question count) and the points deducted. So a test out of 50 points where a student lost 7 points scores (50 minus 7) divided by 50, or 86 percent. If your test has truly variable weighting per item, a full gradebook is a better tool: OpenEduCat's gradebook supports custom point values, rubric scoring, and weighted categories per assignment.

Why does the grid only show up to half the questions wrong?

Most teachers only need to look up scores in the upper half of the chart, because below 50 percent the grade is almost always failing and the exact percentage matters less for grading decisions. Cutting the grid off at total divided by two keeps the printable chart compact enough to fit on a single page even for 100-question tests. If you need the full chart all the way down to "every answer wrong equals zero percent," use single-score mode and enter any wrong count from zero to the total. The single-score result always shows the exact percentage and letter grade regardless of how poor the score is.

Is this Easy Grader free to use and do I need to create an account?

Yes, it is completely free with no account required, no email signup, no usage limits, and no watermark on the printable chart. The tool runs entirely in your browser; nothing you type is sent to a server, saved, or shared. You can use it on a school laptop, a personal phone, or a Chromebook without any privacy concerns. OpenEduCat builds free tools like this one because we make money from schools and universities that adopt our full education ERP for managing enrollment, attendance, gradebooks, and finances. The grader is a small thank-you to the wider teaching community.

How is this different from the gradebook in OpenEduCat?

This Easy Grader is a single-purpose calculator: enter a test length and read off the score for each possible wrong count. OpenEduCat's gradebook is a full classroom system that stores every student's scores across every assignment for the whole term, applies weighted categories (tests 40 percent, homework 30 percent, participation 30 percent), computes running averages, generates parent and student progress reports, exports to PDF transcripts, and integrates with attendance, fees, and the school calendar. Use the Easy Grader when you have a stack of quizzes to grade right now and a pencil in your hand. Use the gradebook when you need to manage 30 students across an entire semester.

Does the percentage round up or down to the letter grade?

The calculator displays the percentage to two decimal places (for example 86.67 percent) and then maps it to the letter grade by checking whether it meets each threshold from highest to lowest. So if your scale says B is 80 percent or above, a score of 79.99 percent gets a C, not a B, because it does not actually reach the 80 percent threshold. This is how most institutional grading scales work; rounding up is a separate, optional courtesy that many teachers apply manually at the end of the term. If you want different behavior (round half up, always round up, only round at the term boundary), apply that adjustment when you transfer the score to your gradebook.

For Teachers

Free Easy Grader

Enter how many questions are on the test, see the score and letter grade for every possible wrong count, and print the grading chart. No login, no ads, no data stored.

Number of questions

Between 1 and 200.

EZ-Grader chart for 20-question test

Scale: A 90% / B 80% / C 70% / D 60% / F 0%

# Wrong	Correct	Score %	Grade
0	20	100.00%	A
1	19	95.00%	A
2	18	90.00%	A
3	17	85.00%	B
4	16	80.00%	B
5	15	75.00%	C
6	14	70.00%	C
7	13	65.00%	D
8	12	60.00%	D
9	11	55.00%	F
10	10	50.00%	F

Generated with the free OpenEduCat Easy Grader · openeducat.org/tools/easy-grader

How the Easy Grader works

The Easy Grader (also called an EZ-Grader) is a teacher’s lookup chart that shows the percentage score and letter grade for every possible number of wrong answers on a test. For a 20-question quiz, the chart shows what 1 wrong is worth, what 2 wrong is worth, and so on. The math is simple: percentage equals (total minus wrong) divided by total, times 100. Letter grades come from your configured scale (defaulting to 90 A, 80 B, 70 C, 60 D, 0 F).

Why a chart instead of mental math? Because grading a stack of 30 quizzes is faster when you can glance at a row instead of recomputing each score. The printable grid option produces a clean chart you can keep next to your gradebook. Most teachers print one chart per test length they grade often (10, 20, 25, 30, 50 questions) and keep them in a folder.

For variable-point tests, weighted assignments, or full-term grade tracking, see the other free teacher tools or look at how a real gradebook handles the same task across an entire class for an entire semester.

Frequently asked questions

The classic Easy Grader (EZ-Grader) formula is straightforward: subtract the number of wrong answers from the total number of questions, divide that by the total, then multiply by 100. So if a test has 25 questions and a student got 4 wrong, the score is (25 minus 4) divided by 25, times 100, which is 84 percent. This calculator does that math for every possible "wrong" count between zero and half the test, then maps each percentage to a letter grade using your chosen scale. You can also use single-score mode if you only need one student or one test result quickly.

Grade entire classes automatically in OpenEduCat’s gradebook

The Easy Grader is handy for one stack of quizzes. For a full term across 30 students, 6 subjects, and weighted categories, the OpenEduCat gradebook handles it all: automatic averages, parent reports, transcript exports, and integration with attendance and fees.

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