Easy grader for teachers
This easy grader turns a stack of marked papers into grades in seconds. Enter how many questions the test has and how many a student got wrong; the percentage and the letter grade appear at once. Below that, the grading chart lists every possible number wrong, so you can grade the whole class without typing again.
Example: Number of questions (or points) 40 · Number wrong 6 · Letter grades: A, B, C, D, F (90 / 80 / 70 / 60) → Grade: 34 / 40 = 85% – B. Source: Wikipedia – Academic grading in the United States (letter grades and percentage bands: A 90–100, B 80–89, C 70–79, D 60–69, F 0–59; plus/minus bands A+ 97–100 … D− 60–62). Updated: .
How it is calculated
Grade = number correct ÷ number of questions × 100. An easy grader does this division for every possible score at once, so a teacher only has to count the wrong answers and read the grade off the chart.
How to use the easy grader
- Enter the number of questions on the test. If questions carry different points, enter the total points instead.
- Enter the number wrong for one student – or skip this and go straight to the chart.
- Read the percentage and the letter grade. For the rest of the class, look up each number wrong in the grading chart.
Example
A quiz has 40 questions and a student misses 6. Number correct = 40 − 6 = 34. Percentage = 34 ÷ 40 × 100 = 85%, which is a B on the common 90/80/70/60 scale. This example is preloaded above. Each question on a 40-question test is worth 2.5 percentage points.
A second example with rounding: 30 questions, 4 wrong. 26 ÷ 30 × 100 = 86.67%, rounded to 87% – a B, or a B+ if your school uses plus and minus grades.
Letter grade scales
The chart uses the percentage bands that are most common in US schools. Many districts publish their own – a 10-point scale, a 7-point scale or standards-based marks – so treat the letters as a starting point.
| Letter | Simple scale | With plus and minus |
|---|---|---|
| A | 90–100% | A+ 97–100, A 93–96, A− 90–92 |
| B | 80–89% | B+ 87–89, B 83–86, B− 80–82 |
| C | 70–79% | C+ 77–79, C 73–76, C− 70–72 |
| D | 60–69% | D+ 67–69, D 63–66, D− 60–62 |
| F | 0–59% | 0–59 |
Half points and partial credit
Tick “Show half points in the chart” if you give partial credit. The chart then steps through 0, 0.5, 1, 1.5 … wrong. With 30 questions and 4.5 wrong, the student has 25.5 correct: 25.5 ÷ 30 × 100 = 85%.
Grading by points instead of questions
For a test worth 50 points, enter 50 as the number of questions and the points lost as the number wrong. A student who lost 8 points has 42 ÷ 50 × 100 = 84%. For weighted categories such as homework, quizzes and exams, use the grade calculator; to adjust a whole set of scores, the grade curve calculator.
Print or share the chart
The number of questions is stored in the page address. Bookmark the chart for the tests you give most often, print it for your desk, or send the link to a colleague or a parent who asks how a score became a grade.
Frequently asked questions
How do I use an easy grader?
Enter the number of questions on the test and the number a student got wrong. The tool shows the percentage and letter grade, and the chart below lists the grade for every possible number wrong.
How do you calculate a test grade?
Divide the number of correct answers by the total number of questions and multiply by 100. Example: 34 correct out of 40 is 34 ÷ 40 × 100 = 85%.
What grade is 6 wrong out of 40?
34 out of 40 is 85%, a B on the 90/80/70/60 scale.
What grade is 4 wrong out of 30?
26 out of 30 is 86.67%, rounded to 87% – a B, or a B+ with plus and minus grades.
Can I grade with half points?
Yes. Type a number wrong such as 4.5, and tick “Show half points in the chart” to list every half step.
How many questions can the test have?
Any whole number from 1 to 200. For longer tests, enter the total points and the points lost instead.
Which letter grade scale does the chart use?
By default A from 90%, B from 80%, C from 70%, D from 60% and F below 60%. You can switch to plus and minus grades or show percentages only.
How are percentages rounded?
To the nearest whole percent, with .5 rounded up: 86.67% becomes 87%, 82.5% becomes 83%.
Can I print the grading chart?
Yes. Set the number of questions and use your browser’s print function; the chart prints as a table.
Sources and legal basis
As of: · Editorial policy
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