Digital Toolchest

EZ Grader — Test & Quiz Grader

Get an instant percentage and letter grade for any test or quiz. Enter questions wrong and total questions — results appear immediately.

Questions wrong and total

Enter the number wrong and total questions.

Example: 4 wrong out of 25 total. Everything runs locally in your browser.

Score and letter gradePercentage score and letter grade based on your input.

2 lines in0 lines outN/A runtime

Your score will appear here...

Grades calculate instantly on any device.

How to grade a test

Grade in 3 steps

Takes ~5 seconds
  1. 1
    Enter wrong answers

    Type the number of questions answered incorrectly.

  2. 2
    Confirm total questions

    Use the default total or enter the number of questions on the test.

  3. 3
    Read your grade

    Your percentage and letter grade appear instantly.

Works for quizzes, tests, exams, and assignments of any length.

Who should use this tool?

  • Teachers grading quizzes and tests quickly without a gradebook
  • Students checking their own score before results are posted
  • Parents helping kids understand their test performance

Examples

4 wrong out of 25 total questions.

Input
Questions wrong
4
Total questions
25
Output
84.0% — B

0 wrong out of 20 — perfect score.

Input
Questions wrong
0
Total questions
20
Output
100.0% — A

7 wrong out of 30 questions.

Input
Questions wrong
7
Total questions
30
Output
76.7% — C+

Fast test grading for teachers and students

Skip the manual math and get an accurate grade in seconds. Works for any test length on any subject.

This EZ grader calculator converts wrong answers and total questions into a percentage score and letter grade instantly. Ideal for teachers grading quizzes or students checking test scores. Uses the standard US grading scale with plus and minus grades. All calculations run locally in your browser.

Instant results

Get a percentage and letter grade the moment you enter your numbers.

  • Percentage score
  • Letter grade
  • No signup needed
Teachers and students

Grade a single quiz or check your own test score in seconds.

  • Works for any subject
  • Any number of questions
  • Standard US grading scale
Private by default

All calculations run in your browser. Nothing is sent to a server.

  • No data uploaded
  • Works offline
  • Instant output
Privacy first: we never send your input to a server. Everything runs locally in your browser.

Grading tips

Get consistent, accurate grades every time.

  • Double-check your wrong count before entering — one off changes the grade.
  • Use this alongside a gradebook to track scores over time.
  • For weighted assignments, use the Weighted Grade Calculator instead.

Frequently asked questions

What grading scale does this use?>
Standard US scale: A (93-100), 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).
Can I grade a test with partial credit?>
This tool works with whole number wrong counts. For partial credit grading, use the Weighted Grade Calculator where you can enter percentage scores per assignment.
How do I calculate a grade if I know the score but not wrong answers?>
Use the Percentage to Letter Grade converter instead — enter the percentage directly and get the letter grade without needing the raw wrong count.
Does this tool store my grades?>
No. All calculations happen locally in your browser and nothing is saved or uploaded anywhere.

Related Education tools

Final Grade Calculator

Find out what grade you need on your final exam to hit your target course grade. Enter your current grade, goal grade, and exam weight. Instant result.

Percentage to Letter Grade Converter

Convert any percentage score to a letter grade instantly. Uses the standard US grading scale with plus and minus grades. Free and private, runs in your browser.

Weighted Grade Calculator

Calculate your overall course grade from weighted assignments, exams, and projects. Enter grade and weight pairs to get your final percentage and letter grade.