Calwarden

Test & Quiz Grade Calculator

Calculate test percentage and letter grade based on number of questions.

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Inputs

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Results

Percentage
Letter GradeA-
Correct / Total45/50

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Assumptions

  • This calculator assumes each question is worth the same amount unless you manually simulate partial credit in the wrong-answer field.
  • It uses the built-in plus/minus letter thresholds shown in the calculator rather than your school's exact rubric.
  • Curves, dropped questions, and extra-credit items can make an instructor's official result differ from this estimate.

Sensitivity preview

Total Questions -10%: Percentage 88.90%

Total Questions Current: Percentage 90.00%

Total Questions +10%: Percentage 90.90%

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About this Test Score

Teachers and students use this simple tool to grade tests instantly. Instead of doing the math for every paper, just input the total questions and the number missed to see the percentage and letter grade.

Who this calculator is for

  • Students checking a quiz or exam result the moment they know how many questions they missed.
  • Teachers, tutors, and homeschool parents grading short assessments without a spreadsheet.
  • Anyone converting raw correct-versus-total answers into a percentage and letter grade.

When to use it

  • Score a multiple-choice or short-answer test from total items and misses.
  • Estimate what a few more correct answers would have done to the final percentage.
  • Translate a raw test result into a letter grade before comparing it with class targets.

How to use this calculator

  1. Enter the Total Questions on the exam.
  2. Enter the number of Wrong Answers.
  3. The tool calculates the Percentage and assigns a Letter Grade.

Key assumptions

  • This calculator assumes each question is worth the same amount unless you manually simulate partial credit in the wrong-answer field.
  • It uses the built-in plus/minus letter thresholds shown in the calculator rather than your school's exact rubric.
  • Curves, dropped questions, and extra-credit items can make an instructor's official result differ from this estimate.

Accuracy and testing

Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.

View accuracy page

How this calculator works

Score % = ((Total Questions - Wrong Answers) / Total Questions) × 100 The letter grade is assigned based on a standard scale (A=90-100, B=80-89, etc.).

Inputs explained

Wrong Answers

The number of questions missed. The calculator subtracts this from the total to find the number correct.

Understanding your results

The Percentage is the raw score. The Letter Grade provides a quick qualitative assessment. The Fraction shows Correct/Total.

Example scenarios

1 Missed

50 Questions. 1 Wrong. Score: 98% (A+).

Half Credit

If you want to give half credit for a question, enter '0.5' in Wrong Answers.

Key Features

  • Percentage Output
  • Standard Letter Grades
  • Fraction Display

Tips & Best Practices

  • Use this for homework assignments or quizzes with weird point totals (e.g., 17 questions).
  • The default scale includes +/- grades (e.g., B+, B-).

Frequently Asked Questions

What is a passing grade?
Typically, 60% (D-) or higher is considered passing in US schools, though some institutions require a C (70%) or better.
Can I enter 'Correct Answers' instead?
Yes, you can do the math in reverse. Or, set 'Wrong Answers' to (Total - Correct).
Does this account for weighted questions?
No, this assumes all questions are worth equal points. For weighted questions, calculate the points manually.