Grade Calculator combines your assignments, quizzes, tests, and exams into a single weighted course grade, and switches to a second mode that works backward to tell you the score you need on a remaining final exam to reach a target overall grade. Add as many graded items as your syllabus lists, enter each score and its weight, and the weighted average and letter grade update instantly. Students juggling multiple weighted categories, or checking whether an A is still reachable before finals week, get an immediate answer without building a spreadsheet. Everything runs locally in your browser, so your scores and grade targets never leave your device.
Features
Add unlimited graded items, each with its own score and weight
Computes a weighted average grade using score × weight ÷ total weight
Shows a letter grade alongside the numeric weighted percentage
Second mode solves for the score you need on a remaining final exam
Flags targets over 100% as not achievable and grades already secured
Warns when your entered weights do not add up to 100%
Copy a plain-text summary of every item and the final result
Runs entirely in your browser with no scores uploaded anywhere
How to use the Grade Calculator
Choose Weighted grade or Needed on final
In Weighted grade, add each assignment, quiz, or exam with its score and weight
In Needed on final, enter your current grade, its weight, your target, and the final's weight
Read the weighted grade and letter grade, or the score required on the final
Copy the summary to save or share your results
Example
Input
need 90% overall, final 20%
Output
Need 110% on final (not possible)
Currently at 85% over 80% of the course; the final exam alone cannot close the gap to 90%.
Common errors & troubleshooting
The weighted grade looks wrong even though every score is correct. — Double-check each item's weight — a typo like entering 5 instead of 50 for an exam worth half the grade skews the weighted average.
The needed-final result shows a number well above 100%. — That means the target overall grade is not mathematically reachable given the current grade and the final's weight — aim for a lower, achievable target instead.
Weights entered for the weighted-grade items do not total 100%. — The Grade Calculator normalizes by the total weight automatically, so partial or unusual weight scales still produce a correct weighted average.
Forgot to include a dropped-lowest-score policy. — Remove the item you know will be dropped before calculating, since the tool weights every row you enter.
Frequently asked questions
How does the Grade Calculator work out a weighted grade?
It multiplies each item's score by its weight, adds those together, and divides by the total weight, so grade = Σ(score × weight) ÷ Σ(weight). This normalizes correctly even if your weights don't add up to exactly 100.
Can the Grade Calculator tell me what I need on my final exam?
Yes. Switch to the Needed on final mode, enter your current grade and its weight, your target overall grade, and the final exam's weight, and it solves for the required final-exam score.
What does it mean if the Grade Calculator says I need over 100% on the final?
It means the target grade is not achievable with the remaining weight available — even a perfect final-exam score would not reach it. Try a lower target to see what is realistic.
Does the Grade Calculator show a letter grade too?
Yes, the Weighted grade mode displays both the numeric percentage and a standard letter grade (A through F) next to it.
Do my scores or grades get uploaded when I use the Grade Calculator?
No. The Grade Calculator runs entirely in your browser — every score, weight, and target you type stays on your device and is never sent anywhere.
Can I add or remove graded items in the Grade Calculator?
Yes. Use Add item to include as many assignments, quizzes, or exams as your syllabus lists, and the trash icon on any row to remove one.
Related tools
GPA Calculator — Calculate your grade point average from course grades and credit hours.
Percentage Calculator — Solve percentage problems: X% of Y, X is what % of Y, and percent change.
Rounding Calculator — Round numbers to decimals, significant figures or the nearest multiple.