Grade Calculator
Your weighted average so far, and the mark you need on what is left to finish where you want. Works with any scale — 100, 20, 10, 5.
Runs on your device — nothing you type is sent anywhere100 in most places, 20 in France, 10 in the Netherlands and much of Latin America, 5 in Russia. Put in whatever a perfect score is.
This is weighted arithmetic, which is how nearly every course is marked. Where a course drops your lowest score, caps a component or curves the cohort, the rule is in the syllabus and not in any calculator.
How it works
Three steps, no account, and nothing you type leaves your computer.
List what has been marked
Each assignment, test or project with its mark and how much of the course it is worth. The weights are in your syllabus.
Read your standing
The average is weighted, so a 30% midterm moves it three times as far as a 10% quiz. The bar shows where you sit on your own scale.
Ask what the final needs to be
Switch modes, put in the grade you want, and it works out the mark the remaining work has to earn — including when that is not possible.
When students run this
Before the final, deciding how hard to push
Needing 55 to pass and needing 92 are very different weeks. Knowing which one you are in is the point.
Working out whether a bad mark is survivable
One poor result on a 10% quiz is noise. The same mark on a 40% exam is not, and the weighting is what tells them apart.
Checking a grade the system shows you
Course portals sometimes average unweighted, or leave out work that has not been marked. Doing it yourself catches that.
Planning across several courses
Run each one and see which is closest to a threshold. That is where an extra evening of work changes an outcome.
How weighted grades actually work
Most course marks are a weighted average, and most confusion about them comes from treating them as a plain one. The difference matters enormously in the last weeks of a term.
Weights, not marks, decide the outcome
A plain average treats every score equally. A weighted average multiplies each by how much of the course it is worth, adds those up, and divides by the total weight.
Say you have 82 on assignments worth 20%, 74 on a midterm worth 30%, and 91 on a project worth 20%. The plain average is 82.3. The weighted one is 81.1 — lower, because the weakest mark carries the most weight.
That gap is small here and can be enormous. A 95 on a 5% quiz barely moves anything; a 60 on a 45% exam moves almost everything. When deciding where to spend a limited evening, the weight matters more than the mark.
The question people actually arrive with
Not "what is my average" but "what do I need on the final". That is a different calculation, and it has a definite answer.
You know the points already banked and the weight still to come. Solving for the one unknown gives the mark the remaining work must earn for the whole course to land on your target. Continuing the example, with 70% of the course marked at 81.1 and a 30% final, an overall 70 needs about 44 on that final — comfortable. An overall 85 would need about 94, which is possible but leaves no room.
When the answer is "you cannot"
Sometimes the arithmetic returns a number above the maximum mark. Needing 112 out of 100 is not a hard target; it is an impossible one, and no amount of revision changes that.
This tool says so plainly instead of printing the number and letting you work it out. It is more useful to know that a target has gone than to spend a week chasing it — the honest next step is usually to aim at what is still reachable, or to ask whether anything else can be counted.
The reverse case is worth knowing too. If the required mark comes out at or below zero, the target is already secured: even a blank final leaves you above it. That is a fact worth having before deciding how to spend the last week of a term.
Grades are not on the same scale everywhere
Almost every grade calculator online assumes a mark out of 100, or worse, the American 4.0 grade point average. Neither is universal:
| Where | Top mark | Usual pass |
|---|---|---|
| UK, US, much of Asia | 100 | 40 to 60 |
| France, Belgium, Tunisia | 20 | 10 |
| Netherlands, much of Latin America | 10 | 6 |
| Germany, Austria | 1 is best, 6 worst | 4 |
| Russia, several post-Soviet states | 5 | 3 |
Because this works in weighted averages rather than in letters, it does not need to know which of these you use — set the top mark and the arithmetic is identical. The one system it cannot model directly is the German style, where a lower number is better; there, work in points earned rather than in grades, or invert the scale before entering them.
What a calculator cannot know
The weighted average is the rule almost everywhere, but courses add their own:
- Dropped scores. Many courses discard your lowest quiz, which changes the weights.
- Minimum thresholds. Some require a pass on the final regardless of the average, so a high average does not always save you.
- Curving. Where marks are adjusted against the cohort, your final grade depends on everybody else's.
- Caps. Late work is sometimes capped at the pass mark however good it is.
All four are in the syllabus and none are in any calculator. Read the rules once at the start of a term; it takes ten minutes and it is the difference between a plan and a guess.
Nothing you type is sent anywhere
Marks, weights and targets stay in your browser. There is no server, no account and no logging — nobody needs a record of a bad midterm, least of all a website.
Common questions
Does this work with grades out of 20, or 10, or 5?
Yes. Set the top mark on your scale and the arithmetic is identical — weighted averages do not care what the maximum is. The one system it cannot model directly is the German style where 1 is best and 6 is worst; there, enter points earned rather than grades.
How do I find out what each piece of work is worth?
The syllabus or course outline, which normally lists every assessment with its percentage. If they add up to 100 you have them all; if they do not, something is missing or something has not been marked yet.
What if the mark I need is above the maximum?
Then the target is out of reach with the work that remains, and the tool says so rather than printing an impossible number. Aim at what is still achievable, or ask whether anything else can be counted towards the grade.
Why is my average different from the one my course portal shows?
Usually because the portal averages only what has been marked so far, or averages without weights, or includes items you have not seen. Comparing the weights you entered here against the syllabus normally finds the difference in a minute.
Does it handle a course that drops the lowest score?
Not automatically — you would leave that row out, or delete it, and the remaining weights recalculate. Dropped scores, curves and minimum thresholds are course rules that live in the syllabus rather than in the arithmetic.
Is anything I type saved?
No. Marks, weights and targets stay in your browser. There is no server, no account and no logging.
Can I use it for GPA?
Indirectly. Enter the grade points for each course as the mark and its credit hours as the weight, and the weighted average is your GPA on that scale. It is the same arithmetic wearing a different name.
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Every one of them runs on your device. No uploads, no accounts.