📝Test Grade Calculator - Calculate Your Test Score in Seconds
Calculate test grades instantly! Enter total questions and wrong answers to get percentage scores and letter grades.
Last updated: February 3, 2026
Calculate your test grade quickly and accurately with our free test grade calculator. Whether you're a teacher grading assignments or a student checking your exam score, this tool instantly converts your test results into percentage scores and letter grades. Simply enter the total number of questions and how many you got wrong to see your grade immediately.
Our grade calculator supports multiple grading scales including standard A-F grading, percentage-based scoring, and customizable scales for different educational systems. Perfect for quizzes, tests, exams, and assignments of any size.
Common Test Score Examples
Here are some commonly searched test score conversions to help you quickly understand your grade:
| Score | Percentage | Letter Grade | Status |
|---|---|---|---|
| 20/20 | 100% | A | Perfect Score |
| 18/20 | 90% | A | Excellent |
| 15/20 | 75% | C | Average |
| 27/40 | 67.5% | D | Passing |
| 45/50 | 90% | A | Excellent |
| 7 wrong out of 40 | 82.5% | B | Good |
| 75/80 | 93.75% | A | Excellent |
These examples use the standard 10-point grading scale. Your actual grade may differ if your institution uses a different scale.
Grading Scales Explained
Standard 10-Point Scale
The most common grading scale in US education, where each letter grade spans 10 percentage points:
- A: 90-100% (Excellent)
- B: 80-89% (Good)
- C: 70-79% (Average)
- D: 60-69% (Below Average)
- F: Below 60% (Failing)
Plus/Minus Grading Scale
Many schools add plus and minus modifiers to provide more granular feedback. In this system, each letter grade is divided into three tiers, rewarding students who score in the higher ranges of each letter grade.
7-Point Scale
Some institutions use a more rigorous 7-point scale where:
- A: 93-100%
- B: 85-92%
- C: 77-84%
- D: 70-76%
- F: Below 70%
This scale is often used in honors and AP courses to maintain higher academic standards.
Tips for Teachers Using Grade Calculators
- Create a grading template: Save time by establishing your grading scale preferences at the beginning of the semester
- Consider curved grading: If a test proves too difficult, adjust the scale to reflect the class performance
- Use the grading table: Print or bookmark the complete grading table for quick reference while grading stacks of tests
- Communicate clearly: Always inform students of your grading scale before assessments
- Track class averages: Use the calculator to identify trends in class performance and adjust instruction accordingly
Tips for Students Tracking Grades
- Set target scores: Calculate what score you need on upcoming tests to achieve your desired grade
- Understand partial credit: Remember that many tests award partial credit, so your actual score might be higher than expected
- Track progress: Use the calculator throughout the semester to monitor your academic performance
- Know your scale: Confirm which grading scale your teacher uses before calculating your grade
- Factor in weighted grades: If your course uses weighted categories, calculate each component separately
Understanding Passing Grades
The definition of a passing grade varies by institution and course level:
- Most US schools: 60% or D- is considered passing
- Many colleges: 70% or C- required for credit in major courses
- Graduate programs: Often require 80% or B- to pass
- Professional certifications: May require 75-80% to pass
Always check your specific program's requirements, as passing standards can significantly impact your academic progress and degree completion.
Frequently Asked Questions
A 75% is typically a C on the standard 10-point grading scale (70-79% = C). However, on a 7-point scale, it would be a D. Always verify with your instructor's specific grading scale.
Divide the number of correct answers by the total number of questions, then multiply by 100. For example: (18 correct ÷ 20 total) × 100 = 90%.
In most US schools, a D (60-69%) is considered passing for general courses. However, many programs require a C (70%) or higher for courses in your major or for transfer credit. Graduate programs often require 80% or B- to pass.
Yes! Our calculator allows you to customize the grading scale to match your institution's specific requirements. You can choose from Standard, Plus/Minus, College (stricter), or Pass/Fail grading scales.
A test grade calculator converts individual test scores to letter grades, while a GPA calculator averages multiple course grades over a semester or academic career to determine your cumulative grade point average.
This depends on the total number of questions. On a 10-point scale where 90% is an A, you can miss 10% of the questions. For example, on a 50-question test, you can miss 5 questions and still score 90%.
Use the grading scale: A = 90-100%, B = 80-89%, C = 70-79%, D = 60-69%, F = below 60%. Some schools use plus/minus grades for more precise grading (A+, A-, B+, etc.).
Standard grading uses simple letter grades (A, B, C, D, F) with 10-point ranges. Plus/minus grading adds modifiers (A+, A-, B+, etc.) with typically 3-4 point ranges per grade, allowing for more precise grade distinctions.
GPA points are assigned to each letter grade: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0. With plus/minus grading, A- = 3.7, B+ = 3.3, B- = 2.7, etc. Your GPA is the average of all your course GPA points.
Yes! For weighted tests, enter the total possible points as "Total Questions" and your earned points as "Correct Answers". The calculator will compute your weighted percentage correctly.