Easy Grader
Enter how many questions or points a test has and get the whole grading chart at once: every possible number wrong, the score it leaves and the letter grade, ready to print and keep beside your marking pile. Free, no sign-up.
Score chart for 30 questions
| Wrong | Score % | Grade |
|---|---|---|
| 0 | 100 | A |
| 1 | 97 | A |
| 2 | 93 | A |
| 3 | 90 | A− |
| 4 | 87 | B+ |
| 5 | 83 | B |
| 6 | 80 | B− |
| 7 | 77 | C+ |
| 8 | 73 | C |
| 9 | 70 | C− |
| 10 | 67 | D+ |
| Wrong | Score % | Grade |
|---|---|---|
| 11 | 63 | D |
| 12 | 60 | D− |
| 13 | 57 | F |
| 14 | 53 | F |
| 15 | 50 | F |
| 16 | 47 | F |
| 17 | 43 | F |
| 18 | 40 | F |
| 19 | 37 | F |
| 20 | 33 | F |
| 21 | 30 | F |
| Wrong | Score % | Grade |
|---|---|---|
| 22 | 27 | F |
| 23 | 23 | F |
| 24 | 20 | F |
| 25 | 17 | F |
| 26 | 13 | F |
| 27 | 10 | F |
| 28 | 7 | F |
| 29 | 3 | F |
| 30 | 0 | F |
Score = (total − wrong) ÷ total × 100. Each letter follows the rounded score shown beside it.
How to Use the Easy Grader
- 1. Enter the test length. Type the number of questions, or switch to points and type the total points when questions are worth different amounts.
- 2. Allow half points if you give them. The chart then steps by 0.5, so an answer that earns half credit has its own row.
- 3. Set decimals, rounding and the letter scale. Whole numbers rounded to the nearest is the classic chart. Round down if your gradebook truncates, or show decimals to see exact scores.
- 4. Grade or print. Find the number wrong and read across. Print chart sends only the chart to the printer — the controls and this page's text stay off the paper.
How the Chart Is Calculated
Each row answers one question: if a student misses w of n, what score is left? Score = (n − w) ÷ n × 100. On a 25-question test each wrong answer costs exactly 4 points, so the chart runs 100, 96, 92, 88 and so on. On a 30-question test each costs 3⅓ points, and that is where rounding starts to matter.
| Number wrong | Exact score | Chart shows | Letter |
|---|---|---|---|
| 0 | 100 | 100 | A |
| 1 | 96.67 | 97 | A |
| 2 | 93.33 | 93 | A |
| 3 | 90 | 90 | A− |
| 4 | 86.67 | 87 | B+ |
| 5 | 83.33 | 83 | B |
| 6 | 80 | 80 | B− |
Each letter follows the rounded score the chart prints beside it, so the rounding choice can change a grade. Four wrong out of 30 is 86.67%, which rounds to 87 — a B+ — but becomes 86, a B, if you round down.
Rounding and Decimal Choices
- To the nearest — 86.67 becomes 87, and an exact half rounds up. This is the usual choice and what most printed grading charts show.
- Down — every score is cut to the places shown, so 86.67 becomes 86. Use it when your gradebook truncates, so the chart never promises more than the gradebook records.
- Up — 86.2 becomes 87. Less common, but some teachers give students the benefit of every fraction.
- Decimals — one or two decimal places show the exact score; with two, 96.67 stays 96.67.
The letter grades use the plus/minus scale (A from 93, A− from 90, B+ from 87 and so on down to D− at 60), the same scale with an A+ from 97, or the 10-point A–F scale. For any other cutoffs, look the score up in the Letter Grade Calculator, which takes a custom scale.
Frequently Asked Questions
- How do I calculate a test score from the number wrong?
- Subtract the number wrong from the number of questions, divide by the number of questions and multiply by 100. With 4 wrong out of 30, that is (30 − 4) ÷ 30 × 100 = 86.67%, which rounds to 87%.
- How many points is each question worth?
- 100 divided by the number of questions: 4 points each on a 25-question test, 5 on a 20-question test and 3.33 on a 30-question test. When questions carry different values, count by points instead and enter the total points possible.
- Can the chart handle half credit?
- Yes. Tick Allow half points and the chart adds a row for every 0.5 step. A student with 1.5 wrong out of 30, for example, scores 28.5 ÷ 30 × 100 = 95%.
- Why does my gradebook show a different score from the chart?
- Usually because of rounding: a gradebook may keep decimals or truncate instead of rounding to the nearest. Set the chart's decimals and rounding to match it. The letters also depend on the grading scale, so choose the one your school uses.
- Is this the same as an EZ Grader slide chart?
- It does the same arithmetic as a cardboard slide grader: the score for each number wrong on a test of a given length. This chart is independent and free, covers tests of up to 300 questions or points, handles half points, and prints in up to three columns.
- How do I print the grading chart?
- Choose Print chart. The printout keeps the chart and its note and leaves off the settings, the site's header and footer, and this page's text, so the chart for a typical classroom test fits on one page.