Student calculator

What Score Do I Need on My Final Exam?

Enter your current non-final grade, the final exam's weight, and your target course grade. Kalcue calculates the minimum final-exam score needed and explains when the target is already secured or would require more than 100%.

Required final-exam score92%

needed on the final to reach 85% overall

Current-work contribution: 57.4%
Course grade with 0% final: 57.4%
Course grade with 100% final: 87.4%
Final's share of course grade: 30%

The displayed requirement is rounded up to the nearest 0.01 percentage point so the shown score does not fall just below the mathematical threshold.

Final grade formula

First model the course grade as G = C × (1 − w) + F × w, where C is the current non-final grade, F is the final-exam score, and w is the final's weight written as a decimal.

Solving for the unknown final score gives F = [T − C × (1 − w)] ÷ w, where T is the target course grade. For example, a 30% final uses w = 0.30.

Worked example

Suppose your current grade is 82%, the final is worth 30%, and you want an 85% course grade. Your completed work contributes 82 × 0.70 = 57.4 course points. You still need 85 − 57.4 = 27.6 points from the final.

Divide 27.6 by 0.30: you need 92% on the final to finish with 85% under these assumptions.

How to choose the right current grade

Use the percentage average for all non-final work after those categories have been normalized to 100%. A learning-management system may show either a running grade that ignores ungraded work or a total that treats missing work as zero. Those are not interchangeable. Check the syllabus and the gradebook's calculation settings before using the number.

If assignments other than the final are still ungraded, estimate those first or wait until they are included. This calculator treats the final exam as the only remaining graded component.

How to interpret the result

0% to 100% required: the target is mathematically reachable. A result of exactly 100% means a perfect final is required.
Target already secured: your current work contributes enough points to reach the target even with a 0% final.
More than 100% required: the target is not reachable unless your actual course rules allow something this model excludes, such as extra credit or a curve.

Kalcue rounds an achievable required score up to the nearest 0.01 percentage point. Your instructor or gradebook may use more precision, round only at the end, or apply a different letter-grade cutoff.

Assumptions and limits

Grades and the final exam use a standard 0–100 percentage scale.
The current grade represents every non-final category, and the final's weight is the entire remaining course weight.
All course weights total 100%, with no extra credit beyond 100%.
There is no curve, dropped grade, score replacement, pass/fail rule, or special rounding policy.
The syllabus and official gradebook—not this estimate—determine the recorded grade.

Frequently asked questions

What score do I need on my final exam?

Multiply your current non-final grade by the portion of the course already completed, subtract that contribution from your target course grade, and divide the remainder by the final exam's decimal weight. Kalcue performs those steps and rounds the displayed requirement up to the nearest 0.01 percentage point.

What should I enter as my current grade?

Enter your average for all work other than the final, normalized to a 0–100 percentage. Do not use a gradebook total that already counts the ungraded final as a zero. If your gradebook uses a running total, confirm that it excludes the final and correctly weights the completed categories.

Why does the calculator say my target is already secured?

Your non-final work contributes enough course percentage points to meet the target even if the final-exam score is 0%. A higher score can still raise your overall course grade.

What does an above-100% required score mean?

The target cannot be reached under this calculator's standard 0–100 assumptions. Your course may still have extra credit, a curve, replacement grades, or special rounding, so check the syllabus or ask the instructor.

Does the calculator account for curves, dropped grades, or extra credit?

No. It models one final exam as the only remaining category, assumes scores cannot exceed 100%, and applies no curve, dropped score, extra credit, grade replacement, or special rounding rule.

Education and math sources

Formula, examples, and explanatory content reviewed August 31, 2026. See the Kalcue methodology and editorial policy.