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- {{grade.letter}}
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- {{grade.letter}}
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| Wrong | Right | Grade |
|---|---|---|
| {{answers.wrong}} | {{answers.total - answers.wrong}} | {{answers.percentage}}% = {{getLetterForPercentage(answers.percentage)}} |
How To Use EZ Grader
Step by Step Instructions
One of the best things about the EZ Grader is how simple it is to use. You don’t need a calculator or grade chart—just follow these quick steps:
1. Enter the total number of questions
At the top of the tool, type the full number of questions on the test, quiz, or homework. This sets the baseline for the score calculation.
2. Enter the number of wrong answers
In the box labeled Total Wrong, type how many problems the student missed. You don’t need to calculate anything—the tool does the math instantly.
3. View the results
The EZ Grader immediately shows the student’s score as a percentage and as a letter grade. For example, missing 3 out of 50 questions displays 94% – A.
4. Grade another assignment
When you’re ready to score a new test, click Grade Another to reset the form. You can repeat the process as many times as you need.
5. Adjust the grading scale (optional)
Every school or teacher may use slightly different cutoffs for grades. If you’d like to customize how percentages translate into letter grades, click Set Grade Scale. You can then adjust the boundaries so the results line up with your grading policy.
EZ Grader – Tips & Tricks
✅ Double-check your entries – Make sure the total questions and wrong answers are correct for accurate results.
✅ Stay consistent – If you use a custom grade scale, apply it across all assignments to keep grading fair.
✅ Save your results – Record the grade in your gradebook, take a screenshot, or write it down so you don’t need to re-enter later.
Custom Grade Scale
By default, the tool might use a standard scale (e.g., 90-100% = A, 80-89% = B, etc.). However, some teachers and institutions use different scales. You can set your own thresholds, for example:
- 93–100% = A
- 85–92% = B
- 75–84% = C
- 65–74% = D
- Below 65% = F
This flexibility ensures the EZ Grader can be adapted to your school or district’s grading policy.
Real-World Examples
Elementary classroom quiz:
A teacher gives a 20-question spelling test. One student gets 3 wrong.
- Correct = 20 – 3 = 17
- Percentage = 17 ÷ 20 = 0.85 = 85%
- Grade = B
Middle school math exam:
A student takes a 40-question algebra test and misses 7 problems.
- Correct = 40 – 7 = 33
- Percentage = 33 ÷ 40 = 0.825 = 82.5%
- Grade = B-
High school final exam:
During a 75-question history final, a student misses 12 questions.
- Correct = 75 – 12 = 63
- Percentage = 63 ÷ 75 = 0.84 = 84%
- Grade = B
College entrance prep:
A high schooler practicing ACT Science answers 30 out of 35 questions correctly.
- Wrong = 35 – 30 = 5
- Percentage = 30 ÷ 35 = 0.857 = 85.7%
- Grade = B
Parent checking homework:
At home, a parent reviews a 15-question worksheet where their child missed 2.
- Correct = 15 – 2 = 13
- Percentage = 13 ÷ 15 = 0.867 = 86.7%
- Grade = B
Tips for Using the EZ Grader Effectively
- Batch grading: Keep the tool open during test review sessions to enter scores as you go.
- Homework checks: Parents can quickly score assignments before the teacher does.
- Exam prep: Students can track how many questions they can afford to miss to still get an A or B.
For example, if a student knows they need at least an 85% to maintain their GPA, they can use the EZ Grader to calculate the maximum number of mistakes allowed on each practice test.
Frequently Asked Questions
What is an EZ Grader?
An EZ Grader converts right/wrong out of total into a percent and letter grade instantly. Example: 17/20 = 85% (B).
How do I use an EZ Grader?
Enter total and either correct or missed; the tool shows percent + letter automatically – no button needed.
What is X out of Y as a percentage?
Use (X ÷ Y) × 100. Example: 23/25 = 92% (A−).
How many questions can I miss and still get 90%?
You need at least ceil(0.90 × total) correct; the rest can be missed. Example: 23 total → need 21 correct → miss 2.
How many can I miss and still get a B (80%)?
You need ceil(0.80 × total) correct. Example: 40 total → need 32 correct → miss 8.
Does 89.5% round up to 90% in EZ Grader?
If Round (nearest) is on, 89.5% → 90%; if Truncate is used, it stays 89%—follow your class policy.
Can I set custom letter grade cutoffs (A-/B+/…)?
Yes – adjust thresholds (e.g., A ≥ 93, A− ≥ 90) in Settings so letters match your school’s bands.
Can EZ Grader handle partial credit (0.5 points)?
Yes—enter decimals for correct/earned points. Example: 18.5/25 = 74% (C).
How do I grade by points instead of questions?
Use Points Mode: percent = (points earned ÷ points possible) × 100. Example: 45/60 = 75% (C).
How do I add extra credit in EZ Grader?
Add extra credit to earned; percent and letter update. Example: 88/100 +5 EC → 93% (A).
What’s the fastest way to grade a 100-question test?
Each miss ≈ 1% off. Example: miss 8 → 92%.
Related Calculators
If you’re using the EZ Grader, you may also find these calculators helpful:
- Final Grade Calculator – to figure out what you need on your final exam to reach a desired grade.
- GPA Calculator – to see how class grades affect your overall GPA.
- Grade Percentage Calculator – for weighted categories like quizzes, homework, and exams.
Together, these tools give a complete picture of academic performance.