Find the exact score you need on your final exam to hit your target grade — plus your best- and worst-case outcomes.
Best possible grade
89.5%
Lowest guaranteed grade
59.5%
Calculator
You need on the final
101.7%
Even a perfect 100% on the final only reaches 89.5%. Your target isn't reachable from here.
Where the final takes you
If you score 0%
59%
Score needed
100%
If you score 100%
90%
How the final grade formula works
Your course grade is a weighted average: the work you've already done counts for (100 − final weight) percent, and the final counts for the rest. So grade = current × (1 − w) + final × w, where w is the final's weight as a decimal. Rearranging for the final gives the score you need: final = (target − current × (1 − w)) / w.
If the required score comes out above 100%, your target is out of reach no matter how well you do — aim for the best-possible grade instead. If it comes out at or below 0%, you've already secured your target even if you skip the final.
What counts as my 'current grade'?
It's your overall course average so far, excluding the final — the grade your teacher would record if everything except the final were already counted. Most learning-management systems show this as your running total.
What if my course has many weighted categories?
Treat everything before the final as one combined 'current grade' and enter the final's weight separately. For a full category-by-category breakdown, use a weighted grade calculator instead.
Can the score I need be over 100%?
Yes — that just means the target is mathematically impossible given how much weight the final carries. The calculator flags this and shows the highest grade you can still earn.
Results are estimates. Verify with a professional for important decisions.
About this calculator
This calculator tells you the exact score you need on your final exam to finish the course with a target grade. Enter your current grade, your target course grade, and how much the final is worth — and the result is instant. If the required score exceeds 100%, the target is mathematically out of reach, which is itself useful to know before the exam.
How to read your results
The headline figure is the score you must earn on the final exam. The three-bar outcome chart shows your minimum possible course grade (if you score 0 on the final), the required score bar (the score the final needs to reach your target), and your maximum possible course grade (if you score 100 on the final). A vertical line marks your target on each bar so you can see at a glance how much room you have. If the required score comes back above 100, the target is unreachable with any exam performance; if it comes back at 0 or below, your target is already secured regardless of the final.
Worked example
Current course grade 78, target course grade 80, final worth 40% of the course.
Required final score: 83. Best possible course grade: 86.8. Worst case (score 0 on final): 46.8.
Frequently asked questions
What is the formula behind this calculator?
Course grade = current × (1 − w) + final × w, where w is the final weight expressed as a decimal. Solving for the final score gives: required = (target − current × (1 − w)) / w. This is the same formula used by RogerHub and Calculator.net.
What does it mean when the required score is above 100?
It means your current grade is too low to reach the target no matter how well you do on the final. The maximum possible course grade is shown in the outcome chart — if that maximum is still below your target, the target is out of reach. Use this as early warning to adjust your target or speak with your instructor.
What if the required score is negative or zero?
A negative or zero required score means you have already secured the target grade even if you skip the final (score 0). You still need to sit the exam if attendance is required, but your course grade is safe.
How do I find my current grade and the final weight?
Your current grade is the cumulative score for all coursework completed so far, usually shown in your learning management system. The final weight is listed in the course syllabus — common values are 20%, 30%, or 40%.
Does the calculator account for extra credit or dropped scores?
No. Enter your current grade after any drops or extra credit have already been applied by your instructor. The calculator uses a single current-grade value and a single final weight.
How it's calculated
The required final score is derived from the weighted-average course grade formula: course grade = current × (1 − w) + final × w, where w = finalWeight / 100. Rearranging to isolate the final exam score gives: required = (target − current × (1 − w)) / w. The best-case course grade assumes a perfect 100 on the final; the worst-case assumes 0. Both are computed from the same formula with the final score substituted in. Sources: RogerHub Final Grade Calculator (https://rogerhub.com/final-grade-calculator/) and Calculator.net Grade Calculator (https://www.calculator.net/grade-calculator.html).
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