Test Grade Calculator
A test grade calculator converts a single test result into a percentage and a letter grade. It divides the score earned by the score available and multiplies by one hundred, then matches the percentage against a percent-to-letter scale. Because grading scales are set by individual schools rather than nationally, the scale used is printed alongside the result. It answers the question for one test only, not for a whole course grade.
Enter one test score and get the percentage, the letter grade, and the grade points it is worth. Pick the mode that matches how your test was scored: questions correct, questions missed, or points earned out of the total.
Quick Answer
Divide the points you earned by the points the test was worth and multiply by 100. Enter questions correct, questions missed, or raw points, and the calculator returns the percentage, the letter grade, and the grade points on its published default scale.
How many you got right.
Must be more than 0.
Leave a box empty and the result waits rather than guessing. A real zero still counts as a zero.
Letter grade · A−
90.00%
18 correct · 2 missed of 20
(18 ÷ 20) × 100 = 90.00%
That is an A-range score on this scale. Your school may use different cutoffs.
Grading scale used here
| Percent | Letter | Grade points |
|---|---|---|
| 97-100% | A+ | 4.0 |
| 93-96% | A | 4.0 |
| 90-92% | A−your score | 3.7 |
| 87-89% | B+ | 3.3 |
| 83-86% | B | 3.0 |
| 80-82% | B− | 2.7 |
| 77-79% | C+ | 2.3 |
| 73-76% | C | 2.0 |
| 70-72% | C− | 1.7 |
| 67-69% | D+ | 1.3 |
| 63-66% | D | 1.0 |
| 60-62% | D− | 0.7 |
| Below 60% | F | 0.0 |
This is the default scale this calculator uses, not a national standard. Schools set their own cutoffs: some use a 10-point scale where 90 to 100 is an A and 80 to 89 is a B, some award no plus or minus grades at all, and some give more than 4.0 for an A+. Check your syllabus or your school's official chart for the cutoffs that count.
Examples
18 correct out of 20
= 90.00% (A−)
2 missed out of 20
= 90.00% (A−)
35 out of 50 points
= 70.00% (C−)
42.5 out of 50 points
= 85.00% (B)
How it works
Formula · Test percentage = (points earned ÷ points possible) × 100
Every mode on this page reduces to the same division. Whatever you earned goes over whatever was available, and the quotient becomes a percentage.
Test percentage = (points earned ÷ points possible) × 100
Questions missed mode · earned = total − missed
The percentage is then matched against the grading scale printed under the calculator. That scale is generated from the same values the calculator scores with, so the published table and the result cannot disagree.
A worked example
A 50-point unit test. You scored 42.5 after half credit on one question. 42.5 ÷ 50 = 0.85, and 0.85 × 100 = 85.00%. On the default scale that is a B, worth 3.0 grade points. Had the test been 50 questions and you missed 7, the missed-questions mode would compute 50 − 7 = 43 correct, then 43 ÷ 50 = 86.00% — still a B, but a different number, which is why the mode matters.
What this page does not do
This calculator scores one test. It does not combine several assignments, and it does not solve backwards for a score you still need.
- To combine a whole class worth of assignments, use the grade calculator.
- To find the score you still need on the final, use the final grade calculator.
- To combine quarters and a semester exam, use the semester grade calculator.
Other names for this tool
This page is what people mean by a test grader: give it the number of questions and how many were right, and it returns the test score percentage along with the letter grade that percentage earns. If your search was how to grade a test, or how to work out a test score percentage, this is the tool for it.
Assumptions and limits
- Every question is worth the same. In the two question-based modes each item counts equally. If your test weights some questions more heavily, add up the points yourself and use Points earned.
- No curve is applied. If your teacher curves the class, the raw percentage here is the starting point, not the grade you will be given.
- The scale is a default, not a rule. Schools set their own cutoffs, and a 1% difference at a boundary changes the letter. The table above is what this page uses; your syllabus is what counts.
- Grade points follow the same default table. Institutions that use a 4.33 scale, or that award no plus and minus grades, will assign different points to the same percentage.
Where to go next
- Grade average calculator — average several test scores into one number.
- Weighted grade calculator — combine categories that carry different weights.
- How to calculate a final grade — the arithmetic behind these tools, worked by hand.
Related Calculators
More tools from Education