Hi everyone,
I’m working on a small side project where I want to build a system that can automatically compute a student’s General Weighted Average (GWA) based on their grades and units.
I already understand the basic formula, but I want to design it in a way that’s efficient, modular, and possibly scalable later. For reference, this explains the GWA concept pretty clearly: What is GWA?
My questions are:

1. What’s the best way to structure the calculation logic so it can handle different grading systems (e.g., weighted units, varying scales)?
2. Would you recommend using a microcontroller, a small script, or a full web-based setup for something like this?
3. Any suggestions on error-checking inputs or validating grade ranges?
4. Has anyone here built a similar academic-calculation tool before?

I’d appreciate any technical guidance, architecture ideas, or example implementations.
Thanks!

MOD EDIT: Link to external site removed.

 

I would make a webpage with that built in. Think of a webpage that any phone or computer can get to. It has a blank form like below. Then type "English 101" tab or click on the next item, type "1.25, tab "3" and the computer will fill in 3.75 and at the bottom the math will say total = 3.75.
Then type in "Math 101", tab"1.5",tab, 3 and the compute will fill in 4.75 then the total will be 4.125.

I do not do web pages, but it is simple for a web designer to do. (I did this many years ago)

Here is an example of a web page that is close to what you want to do. average grades Hit the calculate button to see the math work.
Found another one. grades It is not as easy. There seems to be many out there.

 

This sounds like a school assignment of some kind. Is it?

The site you link to is pretty hopelessly broken. No matter what you put in, it says that you are at 65% and have an F. It's also very clunky.

You need to be a lot more specific about what it is you are trying to do. You talk about web pages and microcontrollers as though they are interchangeable options.

Do you want to develop a webpage for others to access?

Do you want to make some piece of hardware that people buy?

If someone uses your solution, are you going to save the information, or do they have to re-enter everything from scratch every time the use it?

To support different grading schemes, you will have to know what each of those schemes is and provide a way for the user to identify and select which one is appropriate for them. Then you have to decide how to handle people that need a scheme different from any of the ones you support. Do you give them the ability to define a custom scheme? How complicated do you want to get? In the U.S. and many other places there are "honors" or "advanced placement" courses that increase a person's grade average disproportionately to the number of units, but there are a few different conventions for how they do that. Do you need to support that? How do you handle students that retake a failed or unsatisfactory course? Do they just give averaged as if they were independent? Does the later grade replace the earlier grade? Does the earlier grade still count, but with a lesser weight? How do you convert back and forth between letter grades (assuming you support them) and numerical grades? What about low grades in a majors course? If a program requires a C in all majors courses and a student gets a D, what is the policy about how their grade average is calculated? Do you want to support all of the various policies that exist in that regard?

You need to sit down and decide what the scope of your project is.

 

Hi everyone,
I’m working on a small side project where I want to build a system that can automatically compute a student’s General Weighted Average (GWA) based on their grades and units.
I already understand the basic formula, but I want to design it in a way that’s efficient, modular, and possibly scalable later. For reference, this explains the GWA concept pretty clearly: What is GWA?
My questions are:

1. What’s the best way to structure the calculation logic so it can handle different grading systems (e.g., weighted units, varying scales)?
2. Would you recommend using a microcontroller, a small script, or a full web-based setup for something like this?
3. Any suggestions on error-checking inputs or validating grade ranges?
4. Has anyone here built a similar academic-calculation tool before?

I’d appreciate any technical guidance, architecture ideas, or example implementations.
Thanks!

MOD EDIT: Link to external site removed.

My professional work is with university software systems like Anthology, Brightspace and so on. These are huge hosted enterprise systems that major universities use, they do the calculations you see. But I cannot think of any relevance this problem domain can have to microcontrollers or electronics.

You'd be better off using AI to get some background insights, then do more specific research.

 

... I want to build a system ...

That's very ambiguous. Do you mean an app, a spreadsheet, a website, a database? Who's the user? Who enters the data?

 

How can I design a system that automatically computes academic GWA?

find a student or better yet, make it a test question...

 

You're absolutely right a web-based form is the most efficient way to compute GWA. That's exactly why many students prefer using an interactive GWA calculator instead of doing the math manually.
Instead of building everything from scratch, you can look at how an existing GWA calculator structures the form and handles the computation logic. For example, this tool shows how subjects, grades, and units can be dynamically added and calculated:

MOD NOTE: Link removed.