Local · Private · Free

Grade Calculator

Track your weighted course grade live, and find out exactly what score you need on the final to hit your target. All saved in your browser. No signup, nothing uploaded.

Category (homework, midterm…)Weight %Score %

Letter grade cutoffs (editable)

Minimum percentage for each letter. Adjust to match your syllabus.

Everything is calculated and saved on your device only, nothing is uploaded to any server.

What do I need on the final?

Your categories above count for the rest of the course. Set how much the final exam is worth and pick a target.

Final exam weight % e.g. 20 means the final is 20% of the course grade.

Custom target grade %

Required final score by target

How weighted grades work

Each category contributes its score × weight; the total divided by the weight covered is your current grade. For the final-exam math: if the final is worth w% and you're sitting at G%, finishing with target T% requires (T − G×(1−w/100)) ÷ (w/100) on the exam. Anything over 100% is mathematically out of reach, and at 0% the grade may already be secured. All of it runs in your browser, free forever. Need a custom tool for your school or team? Digital Heroes can help.

About Grade Calculator

Grade Calculator is a free, private tool that runs entirely in your web browser. Add your course categories, enter each weight and score, and your current weighted grade updates instantly. The “what do I need on the final?” panel shows the exact score required to hit your A, B, or C target. Because everything runs locally, your data is never uploaded to a server. No sign-up, no installation. It works offline too. Like every free tool by Digital Heroes, it has no limits and no paywalls.

What you can do

Calculate your weighted grade across any number of categories: homework, quizzes, midterms, labs, and more.

Set custom category weights to match your exact syllabus percentages.

See your live letter grade the moment you enter a score, with a standard or custom cutoff scale.

Find the score you need on the final to reach an A, B, C, or any custom target percentage.

Edit letter grade cutoffs to reflect your professor's scale, not a default one.

Copy a full grade summary to your clipboard with one click, including the final exam calculation.

How to use Grade Calculator

Open Grade Calculator in your browser. No signup needed.

Add each course category (homework, midterm, etc.) with its weight % and your score %.

Watch your current weighted grade and letter update live at the top.

Enter the final exam weight and a target grade to see exactly what score you need on the final.

Optionally edit the letter grade cutoffs to match your syllabus, then copy your summary.

Frequently asked questions

Is Grade Calculator free?

Yes, Grade Calculator is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Grade Calculator runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. This tool is a Progressive Web App, once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Grade Calculator do?

It calculates your weighted course grade from your category scores and weights, shows you a live letter grade, and tells you exactly what score you need on the final exam to reach any target percentage.