Grade Calculator
Test Grade Calculator works out Score and Letter grade from Points earned, Points possible and Questions answered wrong. The default figures on this page give score of 84.00 %; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Points earned = 42 of 50 possible
- Percentage = 42 / 50 x 100 = 84%
- Rounded to 2 decimal place(s): 84%
- On the 10-point scale with plus/minus, 84% is a B.
Score needed for each gradetable
| letter | minPercent | minPoints |
|---|---|---|
| A+ | 97 | 48.5 |
| A | 93 | 46.5 |
| A- | 90 | 45 |
| B+ | 87 | 43.5 |
| B | 83 | 41.5 |
| B- | 80 | 40 |
| C+ | 77 | 38.5 |
| C | 73 | 36.5 |
| C- | 70 | 35 |
| D+ | 67 | 33.5 |
| D | 63 | 31.5 |
| D- | 60 | 30 |
| F | 0 | 0 |
Figures from grade point scales, checked 31 August 2026. Its 10 worked examples are re-run on every release, last on 15 September 2026. What changed · how reference data is kept current
Sources and references
6 sources
What the Test Grade Calculator calculates
Converts a test or assignment score into a percentage and a letter grade on the grading scale you choose, averages a gradebook with or without category weights, scores an answer key with negative marking, and shows the score needed for every other letter.
How to use this Test Grade Calculator
Enter Points earned, Points possible, Questions answered wrong and Graded items. Score updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Score, Letter grade and Grade points (4.0 scale).
The method follows University of California - Admissions, GPA requirement: how to calculate your UC GPA, US Department of Education, National Center for Education Statistics - High School Transcript Study methodology, standard grade-point conversion, College Board - How to Convert Your GPA to a 4.0 Scale, National Association of Secondary School Principals / common US district practice - the 10-point and 7-point percentage grading scales and Weighted arithmetic mean: weighted_mean = sum(value x weight) / sum(weight).
42 out of 50 example
With How do you want to enter the score?: points, Points earned: 42, Points possible: 50, the calculator returns Score: 84, Letter grade: B, Grade points (4.0 scale): 3. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Score, Letter grade and Grade points (4.0 scale). The inputs you can vary are Points earned, Points possible, Questions answered wrong, Graded items, Marks per correct answer and Negative marking per wrong answer.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How can I calculate a grade?
Converts a test or assignment score into a percentage and a letter grade on the grading scale you choose, averages a gradebook with or without category weights, scores an answer key with negative marking. Open “How this is worked out” beside the result to see each step for your own figures.
How do I calculate a grade?
It needs Points earned, Points possible, Questions answered wrong, Graded items, Marks per correct answer and Negative marking per wrong answer. Nothing else is required, and the figures stay in your browser.
What is 80% of your grade?
Converts a test or assignment score into a percentage and a letter grade on the grading scale you choose, averages a gradebook with or without category weights, scores an answer key with negative marking. On this page it is computed from Points earned, Points possible and Questions answered wrong and shown as Score, Letter grade and Grade points (4.0 scale).
What information do I need for the Test Grade Calculator?
You need Points earned, Points possible, Questions answered wrong, Graded items, Marks per correct answer, Negative marking per wrong answer, Questions left unattempted and Partial credit awarded. The page opens with default figures that give score of 84.00 %, so you can see the scale before entering your own.
What does this Test Grade Calculator show?
It shows Score, Letter grade, Grade points (4.0 scale), Points earned, Points possible, Points lost, Score before the curve and Passing?, with the working and any warnings for your entries.
Can I check how the Test Grade Calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.