Test grade calculator

This test grade calculator helps students and teachers quickly convert test results into a clear percentage and grade. Just enter the total questions and the number of wrong answers, and the tool will calculate your score automatically. You can also adjust the custom grading table so the results follow your own exam grading scale.

How to Calculate Test Score

Calculating test scores is a common problem that students, teachers, and online learners all face, but if you know the right way , it’s a matter of seconds. Whether it’s a school exam, a university quiz, or an online test for a job interview, knowing the correct calculation will help you understand your results and improve your performance.

First, find out how many questions you answered correctly.

Formula 1: 

Percentage = (Correct Answers ÷ Total Questions) × 100     

Formula 2 (Alternate):

Percentage = ((Total Questions − Incorrect Answers) ÷ Total Questions) × 100

Both of these formulas give you the same result, so use the one that’s easiest for you.

Remember:

Correct Answers + Wrong Answers = Total Questions

If only the wrong answers are known, subtract them from the total questions to get the correct answers.

Grading Scale (US Example):

A+ = 97% – 100%

A = 93% – 96%

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 = Less than 60%

Note: Different educational institutions may set the passing marks at 50%, 60% or even 65%, so always confirm with your teacher or institute.

Example:
Total Questions = 110
Wrong Answers = 21
Correct Answers = 110 − 21 = 89

Percentage = (89 ÷ 110) × 100 = 80%

According to this grading scale, the letter grade is B-.

Special tip: If there are 100 questions on a test, each correct answer is worth 1%. For example, if you answered 85 correctly, your score would be a straight 85%, no calculator needed.

Understanding Your Test Grade Results

Enter Total Number of Questions or Points

• Add how many total questions or points the test contains (e.g., 40, 50, 100).
• Supports quizzes, tests, or full-length exams.

Input Wrong or Correct Answers

• You can enter wrong answers (e.g., “5 wrong”) or correct answers (e.g., “45 correct”) — both formats are accepted.
• This test grade calculator will instantly compute your test score percentage and letter grade .

  Bulk Input Mode for Teachers

• Use the Message Box to paste multiple results in this format:
  • Hadi 2/ 20, nisar 5 wrong of 50, 10/20, etc.
• Ideal for grading an entire class of 30–100+ students at once.
• The system will process all entries in real-time and display grades, percentages, and scores line by line.

  Instant Result & Feedback

• Results include: percentage grade, letter grade (A–F), and performance evaluation.
• Useful for test reviews, performance tracking, or preparing parent-teacher reports.

Perfect for Classrooms, Tutors, and Academic Reporting

• Designed for speed and simplicity — especially during exam week or assignment grading.

Works for multiple types of scoring: percentage-based, point-based, or standard test format.  

Test grade calculator-advanced usage

An advanced test grade calculator goes beyond basic scoring by allowing custom grading scales, adjustable pass marks, and fractional or weighted inputs. With built-in support for extra credit, scenario forecasting, and final exam simulations, it empowers students to plan strategically and track progress with accuracy. This flexibility transforms grade predictor into a transparent, stress-free process that supports academic planning, performance improvement, and goal achievement

Percentage Calculator

Use this tab to quickly convert numbers into percentages and answer common tasks like What is X% of Y, X is what % of Y, Marks → Percentage, Increase/Decrease, and Reverse %. Just choose a mode and enter the two numbers it asks for (e.g., part & total, X & Y) to get an instant, step-by-step result you can trust.

What is X% of Y?

Find marks when you know the percentage and total marks.
Formula: Marks = (X / 100) × Y
Example: What is 75% of 80? → (75/100) × 80 = 60 marks.

X is what % of Y? (Score → Percentage)

Convert a score to percentage.
Formula: Percentage = (X / Y) × 100
Example: 68 out of 85 → (68/85) × 100 = 80% (approx).

Percent Increase / Decrease (Curve/Penalty)

Grade curve (+) or penalty (–) as a percentage change.
Formula: Change % = ((New − Old) / Old) × 100
Example (curve): From 70 to 77 → ((77−70)/70)×100 = 10% increase.
Example (penalty): From 80 to 72 → ((72−80)/80)×100 = −10% decrease.

Reverse Percentage Calculator

Find the original total before a percentage was applied.
Formula (given final and %): Original = Final ÷ (1 ± r) where r = %/100 (use + for increase, − for discount/penalty).
Example (after 10% bonus final = 88): Original = 88 ÷ 1.10 = 80.
Example (after 15% penalty final = 68): Original = 68 ÷ 0.85 = 80 (approx).

FAQ