Weighted Grade Calculator Widget
Let students work out their course grade the way the syllabus weights it. They list each assessment with its score and its share of the grade, see the weighted average and the points each part contributes, and can map the result to a letter using your school's own cut-offs.
Live preview
Under the widget on your page: Powered by A2Z Tools
Embed code
<iframe src="https://a2z.tools/embed/w/weighted-grade-calculator" title="Weighted Grade Calculator by A2Z Tools" width="100%" height="880" style="border:0;width:100%" loading="lazy" allow="clipboard-write"></iframe>
A plain iframe. Works everywhere, including site builders that strip scripts. Adjust height if your content needs more room.
<div data-a2z-widget="weighted-grade-calculator" data-height="880"></div> <script async src="https://a2z.tools/embed.js"></script>
Adds a small script (what it does) that sizes the widget to fit its content, loads it lazily and keeps it isolated from your page's CSS.
Works with
How it works
Each row holds a component name, the score earned as a percentage and that component's weight. The grade is sum(score x weight) / sum(weight). When the weights a student types do not total 100 - because a quiz category is still empty, or the syllabus lists points instead of percentages - every weight is divided by their total, which is the normalising step, and the note says the weights were rescaled. A contribution table shows how many grade points each part supplies, which is the quickest way to see that a 40% final outweighs three small quizzes. Up to eight rows can be added or removed; blank rows are ignored and half-filled rows are named in the message. Scores up to 200% are accepted for extra credit. The letter grade comes from a scale typed as pairs such as A 90, B 80, C 70; bands are sorted automatically and the highest minimum the average reaches wins.
Calculation method
- Weighted grade = sum(score_i x weight_i) / sum(weight_i)
- Weight used for component i = weight_i / sum(weights) x 100
- Points contributed = score_i x weight_i / sum(weights)
- Letter = the band with the highest minimum that the grade reaches
Worked examples
A typical syllabus
Inputs: Homework 92 (20%), Quizzes 85 (15%), Midterm 78 (25%), Final 88 (40%)
Result: 85.85% - letter B on A 90 / B 80 / C 70
18.4 + 12.75 + 19.5 + 35.2 = 85.85.
Weights that need normalising
Inputs: Lab 70 weight 30, Project 100 weight 30
Result: 85%, note says the weights were rescaled from 60
(70 x 30 + 100 x 30) / 60 = 85.
Limitations
- Dropping the lowest score in a category, curving and minimum-exam rules are not applied.
- Each row is one already-averaged category score; individual assignments inside a category must be averaged first.
- Letter cut-offs vary by school; the default A 90 / B 80 / C 70 / D 60 scale is only an example.
Where publishers use it
- Instructor course pages that publish the grading breakdown next to the syllabus
- High-school counselling blogs explaining category-weighted gradebooks
- Tutoring sites helping students decide which assignment to prioritise
- Learning-management help pages that show how a running grade is built
- Homeschool record-keeping guides with their own letter cut-offs
- Nursing, law and business schools whose syllabi mix participation, clinical placement and capstone marks
Questions
What if my weights add up to 90% because the final has not happened yet?
The widget divides by the 90 you entered, so the answer is your current standing on the work done so far. For example, 80 at 50% and 90 at 40% gives (40 + 36) / 90 = 84.44%.
Can I enter points instead of percentages for the weights?
Yes. Weights of 100, 150 and 250 points are normalised to 20%, 30% and 50% automatically, which is how a points-based gradebook behaves.
How do I set my school's letter scale?
Type letter and minimum pairs such as A 93, A- 90, B+ 87, B 83. Order does not matter and colons or semicolons also work: F:0; C:70; A:90.
Why does my final exam move the grade so much?
Its weight multiplies its score. With a 40% final, every 10 marks gained on it adds 4 points to the course grade, while a 5% quiz moves it half a point.
Is extra credit above 100% allowed?
Scores up to 200% are accepted, so a 105% homework average is counted as it is. Scores below 0 or weights of 0 are refused.
Weighted or total-points gradebook - which does my teacher use?
A weighted gradebook gives each category a fixed share, such as tests 50% and homework 20%, however many assignments it holds. A total-points gradebook simply divides all points earned by all points possible, so a 200-point project counts four times a 50-point quiz. Enter the category averages and weights for the first kind; for the second, enter each assignment with its points as the weight.
Can I use it to find what I need on the remaining coursework?
Try values: leave the unfinished component in with a guessed score and adjust it until the weighted grade reaches your goal. For a single final exam the final grade calculator solves this directly.
How do I convert my weighted percentage into a GPA?
First map it to a letter using the scale in your syllabus, then use your school's grade-point table: a B at most US colleges is 3.0. The GPA calculator then combines courses by their credit hours.
Cite or recommend this tool
If you reference this tool in an article, course or documentation, these formats are ready to copy. They are optional - nothing is added to your site unless you paste it.
A2Z Tools Weighted Grade Calculator https://a2z.tools/embed/weighted-grade-calculator
<a href="https://a2z.tools/embed/weighted-grade-calculator">A2Z Tools Weighted Grade Calculator</a>
[A2Z Tools Weighted Grade Calculator](https://a2z.tools/embed/weighted-grade-calculator)
Weighted Grade Calculator by A2Z Tools - https://a2z.tools/embed/weighted-grade-calculator
Related widgets
-
The score you need on the final exam to reach a target grade, plus best and worst cases.
-
Credit-weighted GPA for a term, plus the new cumulative GPA when you add prior results.
-
SGPA for each semester and credit-weighted CGPA across all of them, on a 10-point or 4-point scale.
-
X% of Y, X as a percent of Y, and the percentage change between two values.
-
A clean on-screen calculator with keyboard support, correct operator precedence and percent.
-
Trig in degrees or radians, logs, roots, powers, factorials, pi, e and Ans - typed or tapped.