Find out your test grade instantly. Enter the total number of questions and how many you got wrong - this free test grade calculator shows your percentage score, letter grade, and exactly how many more points you need to reach the next grade. Choose from 7 grading systems including US Plus/Minus, US Standard, UK University, Canadian, Australian, Indian, and Pass/Fail scales, or customize the thresholds yourself.
| # Right | # Wrong | Percentage | Grade |
|---|
How Calculate Your Test Grade
To calculate your test grade, divide the number of correct answers by the total number of questions, then multiply by 100 to get a percentage (or use the test grade calculator above):
percentage score = (correct answers / total questions) × 100
Since correct + wrong = total, you can also write it as:
percentage score = 100 × (total − wrong) / total
For example, if your test had 20 questions and you got 4 wrong, you answered 16 correctly. That gives you (16 / 20) × 100 = 80%. Using the standard US Plus/Minus grading scale, 80% corresponds to a B−.
Once you have your percentage, convert it to a letter grade using a grading scale. The default US Plus/Minus scale works like this:
| Letter Grade | Percentage Range |
|---|---|
| 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 | Below 62 |
Not every school uses plus/minus grades. With a simpler A–F scale: A = 90–100%, B = 80–89%, C = 70–79%, D = 60–69%, F = below 60%. Always check which grading system your school or teacher uses — our calculator lets you switch between seven different scales and customize the thresholds.
How To Use This Test Grade Calculator
Our test grade calculator is designed to be fast and intuitive:
- Choose your grading system from the dropdown menu. Pick from US Plus/Minus (A+ to F), US Standard (A to F), UK University (1st, 2:1, 2:2, 3rd, Fail), Canadian (A+ to F), Australian (HD, D, C, P, F), Indian (O, A+, A, B+, B, C, P, F), or simple Pass/Fail.
- Enter the total number of questions (or points) on the test.
- Enter how many you got wrong. The calculator instantly shows your percentage score, letter grade, and a breakdown of correct vs. wrong answers.
- Check the “next grade” hint – it tells you exactly how many more points you’d need to reach the next grade up. For example, if you scored a B−, it might say “Score 1 more point to reach B.” That’s it – your grade appears immediately with no need to press a button (though there’s a Calculate button if you prefer).
Advanced Features For This Grade Calculator
This test grade calculator goes beyond basic scoring with two powerful features for students and teachers alike:
Customizable Grade Scale
Open the Grade Scale section to modify the percentage thresholds for each grade. If your teacher uses a different cutoff — say, 65% as the passing threshold instead of 60% — simply adjust the D− (or lowest passing grade) value. Every threshold is independently
editable, so you can match your exact school or university grading policy. Hit Reset Scale at any time to return to the default thresholds for your chosen grading system.
Full Grade Table
Open the Grade Table section to see a complete breakdown of every possible score on your test. The table shows the number right, number wrong, percentage, and letter grade for each score — with your current score highlighted. You can also adjust the Point Increment
(default is 1) for tests that award half-points or other fractional scoring. The table is capped at 500 rows, so it works well even for tests with a large number of questions.
These features make the calculator useful not just for checking a single score, but for teachers setting up a grading scale for an entire class or students exploring “what if” scenarios across different score combinations.
Frequently Asked Questions
How do I calculate my test grade?
To calculate your test grade, divide the number of questions you answered correctly by the total number of questions, then multiply by 100. For example, if you got 18 right out of 20, your percentage is (18 / 20) × 100 = 90%. Then convert that percentage to a letter grade using your school’s grading scale — 90% is typically an A− on the US Plus/Minus scale. You can use our test grade calculator above to do this instantly.
What grade is a 70% on a test?
On the standard US Plus/Minus scale, 70% is a C−. On the simplified US scale (without plus/minus), 70% falls at the bottom of the C range (70–79%). In the UK university system, 70% is actually a First Class (1st) — the highest classification. The grade depends entirely on which grading system your school uses, which is why our calculator supports seven different scales.
Is 75 out of 100 a passing grade?
Yes. A score of 75 out of 100 is 75%, which is a passing grade in virtually all standard grading systems. On the US Plus/Minus scale it’s a C, on the UK scale it’s a First (1st), on the Australian scale it’s a Distinction (D), and on the Indian scale it’s an A. The most common minimum passing threshold is 60% (US) or 50% (UK/Australian), so 75% comfortably passes in all systems
What grade is 3 wrong out of 20?
Getting 3 wrong out of 20 means you got 17 correct, which gives a percentage of (17 / 20) × 100 = 85%. On the US Plus/Minus grading scale, 85% is a B. On the simplified A–F scale, it’s also a B (80–89%). On the Canadian scale, 85% is an A. Enter your numbers into the test grade calculator above to see results for any grading system.
How do teachers grade tests on a curve?
Grading on a curve means adjusting the grading scale based on class performance. For example, a teacher might lower the A threshold from 93% to 85% if the test was especially difficult. Our test grade calculator supports this — open the Grade Scale section and adjust each grade’s minimum percentage threshold to match any curved grading policy. You can also switch between seven preset grading systems from different countries.
What’s the difference between US and UK grading scales?
The US scale uses letter grades A through F with percentage cutoffs typically starting at 90% for an A. The UK university system uses classifications: First Class (1st) at 70%+, Upper Second (2:1) at 60–69%, Lower Second (2:2) at 50–59%, Third at 40–49%, and Fail below 40%. This means a score of 72% is a C− in the US system but a First (the highest grade) in the UK system. Our calculator lets you switch between both scales — plus Canadian, Australian, Indian, and Pass/Fail — to compare how the same score translates across different countries.
