How to Use the Grade Calculator
- Enter the total number of questions or possible points.
- Adjust the slider or input the number of incorrect/wrong answers.
- View real-time percentage, letter grade, and full printable grading scale chart.
Mathematical Formula Behind Grade Calculator
Subtract incorrect answers from total questions, divide by total questions, then multiply by 100 for your final grade percentage.
Grade (\%) = \left( \frac{\text{Total Questions} - \text{Wrong Questions}}{\text{Total Questions}} \right) \times 100Step-by-Step Worked Example
Scenario: A student takes a 40-question history exam and misses 6 questions.
Points Earned = 40 - 6 = 34. Percentage = (34 / 40) * 100 = 85.0%.
Outcome: Final Grade is 85% (Solid B, 3.0 GPA point equivalent).
Frequently Asked Questions
What is an EasyGraderLab?
An EasyGraderLab (traditionally known as an EZ Grader) is a sliding chart tool teachers use to quickly calculate percentage grades based on the total number of test questions and the number of missed answers.
How do I calculate a test grade if some questions have different point values?
If questions have different weights, use our Points Grade Calculator or Weighted Grade Calculator to sum points earned over total points possible.
The 10-Point Grading Scale This Calculator Uses
Your percentage converts to a letter grade through your school's grading scale. Most US schools use the standard 10-point bands below (an A starts at 90%, a B at 80%, and so on). Always confirm your syllabus — some districts still use 7-point scales where an A starts at 94.
| Letter | Percentage Range | 4.0 GPA Points | Status |
|---|---|---|---|
| A+ | 97 – 100% | 4.0 | Excellent |
| A | 93 – 96.9% | 4.0 | Excellent |
| A- | 90 – 92.9% | 3.7 | Excellent |
| B+ | 87 – 89.9% | 3.3 | Good |
| B | 83 – 86.9% | 3.0 | Good |
| B- | 80 – 82.9% | 2.7 | Good |
| C+ | 77 – 79.9% | 2.3 | Satisfactory |
| C | 73 – 76.9% | 2.0 | Satisfactory |
| C- | 70 – 72.9% | 1.7 | Satisfactory |
| D+ | 67 – 69.9% | 1.3 | Poor |
| D | 60 – 66.9% | 1.0 | Poor |
| F | Below 60% | 0.0 | Failing |
Prefer a printable copy for your desk or substitute folder? Grab the grade percentage chart or convert the other direction with the percentage to letter grade calculator.
Worked Example: Grading a 40-Question Test
Say a student answers 40 questions and misses 5. Correct answers = 35, so the score is 35 ÷ 40 = 87.5%, which lands at a B+ on the scale above. The same arithmetic works for any point total: 170 points earned out of 200 possible is also 85%. For grading whole stacks of papers, the test grade calculator shows a full missed-questions chart, and how many questions can I miss flips the question around to find the error budget for a target grade.
One Test vs Your Course Grade
A single percentage is only your course grade if the teacher grades by total points. In a weighted course, this test score joins a homework, quiz, and exam category, each with its own syllabus weight — the weighted grade calculator handles that case, and points vs weighted grading explains why the same scores can produce different final grades in the two systems.
What If the Score Is Lower Than You Hoped?
- Check the remaining work first: enter your standing in the grade needed calculator to see the average you need on everything left.
- If only the final remains, the what grade do I need on my final planner gives the exact target score.
- Model best and worst cases with the what-if grade calculator before deciding where to spend study hours.
- Ask about retake or extra-credit policy early — most policies are only available before the final.