Averaging Grades Calculator
Averaging grades calculator works out Score and Letter grade from Graded items, Curve added and Grading scale. The default figures on this page give score of 88.50 %; 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
- Average of 4 grade(s) = (88 + 92 + 79 + 95) / 4 = 88.5%
- Percentage = 88.5 / 100 x 100 = 88.5%
- Rounded to 2 decimal place(s): 88.5%
- On the 10-point scale with plus/minus, 88.5% is a B+.
Score needed for each gradetable
| letter | minPercent | minPoints |
|---|---|---|
| A+ | 97 | 97 |
| A | 93 | 93 |
| A- | 90 | 90 |
| B+ | 87 | 87 |
| B | 83 | 83 |
| B- | 80 | 80 |
| C+ | 77 | 77 |
| C | 73 | 73 |
| C- | 70 | 70 |
| D+ | 67 | 67 |
| D | 63 | 63 |
| D- | 60 | 60 |
| F | 0 | 0 |
Graded items and their contributiontable
| name | score | weight | shareOfGrade | contribution |
|---|---|---|---|---|
| Item 1 | 88 | 1 | 25 | 22 |
| Item 2 | 92 | 1 | 25 | 23 |
| Item 3 | 79 | 1 | 25 | 19.75 |
| Item 4 | 95 | 1 | 25 | 23.75 |
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 averaging grades 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 averaging grades calculator
Enter Graded items, Curve added, Grading scale and Custom grade bands. Score updates as you type. 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).
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 Graded items, Curve added, Grading scale, Custom grade bands, Passing mark and Allow scores above 100%.
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
What information do I need for the averaging grades calculator?
You need Graded items, Curve added, Grading scale, Custom grade bands, Passing mark and Allow scores above 100%. The page opens with default figures that give score of 88.50 %, so you can see the scale before entering your own.
What does this averaging grades 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 averaging grades 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.