Test Grade Calculator
Enter the total questions and how many were wrong to get your percentage score and letter grade instantly.
22 out of 25 correct — grade B+
How the test grade is calculated
Score = (correct ÷ total) × 100. The calculator then matches your score to a letter grade on the standard scale. Twenty-two right out of twenty-five is 22 ÷ 25 = 0.88, or 88% — a B.
The standard grading scale
| Percentage | Letter grade |
|---|---|
| 90–100% | A |
| 80–89% | B |
| 70–79% | C |
| 60–69% | D |
| Below 60% | F |
This ten-point scale is the most common one in US schools, but it is a convention rather than a rule. Some districts set an A at 93 and up, some use a seven-point scale where a D starts at 70, and many courses add plus and minus bands inside each letter. Your syllabus is the authority.
What one question is worth
The number of questions on a test decides how much a single mistake costs, and short tests are far less forgiving than students expect.
- 20 questions — each is worth 5 points. Two wrong is already a 90%, and three drops you to a B.
- 25 questions — each is worth 4 points. You can miss two and hold an A.
- 50 questions — each is worth 2 points. Five wrong still leaves you at 90%.
This is also why partial credit matters so much on short assessments: half a mark on a 10-question quiz is worth the same as a full question on a 20-question one.
Curved and weighted tests
The formula above assumes every question is worth the same and no curve is applied. Two common departures:
- Point-weighted tests. If questions carry different point values, divide points earned by points available rather than counting questions. Ten of fourteen questions right can be anything from 50% to 90% depending on which ten.
- Curves. A flat curve adds a fixed number of points to everyone. A scaled curve maps the top score to 100% and shifts the rest proportionally. Neither changes how the raw score is computed — they adjust it afterwards, so work out your raw percentage first and apply the curve to that.
Related tools
Grading a stack of papers? The Easy Grader shows every possible score at once for a given question count. To see what a test does to your overall course grade, use the weighted grade calculator, and to work out what you still need on the final, try the final grade calculator.
Frequently asked questions
How do I calculate my test grade?
Divide the number of correct answers by the total number of questions, then multiply by 100. For example, 22 correct out of 25 is 88%.
What letter grade is my score?
On a standard scale: 90–100% is an A, 80–89% a B, 70–79% a C, 60–69% a D, and below 60% an F. The calculator shows your letter grade automatically.
Can I grade a whole class quickly?
Yes — use the Easy Grader to see the score and grade for every possible number of wrong answers at once.
How much is one question worth?
Divide 100 by the number of questions. On a 20-question test each one is worth 5 points, so two mistakes already cost you an A. On a 50-question test each is worth 2 points and five mistakes still leave you at 90%. Short tests punish single errors far harder.
What if questions are worth different points?
Count points rather than questions: divide the points you earned by the points available. Getting ten of fourteen questions right can be anywhere from 50% to 90% depending on which ten they were, so question count alone will mislead you.
How do I apply a curve to my score?
Work out your raw percentage first, then adjust. A flat curve adds a set number of points to every score. A scaled curve maps the highest score in the class to 100% and shifts everyone else proportionally. The raw calculation never changes — the curve is applied on top of it.
Is 90% always an A?
Not necessarily. The ten-point scale is the most common convention in US schools, but some districts require 93 for an A, some use a seven-point scale, and many courses add plus/minus bands. Check your syllabus for the cutoffs your course actually uses.