Final Grade Calculator
Know your target grade? This calculator works backwards from it to tell you exactly what score you need on your final exam — and whether that target is still possible.
Score Needed on the Final Exam
How It Works
Your overall grade is a weighted average: your current grade counts for the share of the course already finished, and the final exam counts for the rest. This calculator rearranges that average to solve for the unknown — the exam score. The formula is: required exam score = (desired grade − current grade × completed weight) ÷ exam weight, with the weights as decimals. If the answer comes out above 100%, the target is mathematically out of reach, however well you do on the day; if it comes out below 0%, you have already secured the grade even with a zero on the exam.
Worked Example
Say your current grade is 82% and it covers 70% of the course, while the final exam is worth the remaining 30%, and you want an overall grade of 85%. Your completed work contributes 82 × 0.70 = 57.4 points, so the exam must supply the other 85 − 57.4 = 27.6 points. Dividing by the exam weight gives 27.6 ÷ 0.30 = 92% needed on the final. Aim for 90% instead and the same maths gives 108.67% — impossible, because even a perfect exam only lifts you to 87.4% overall.
How to Use This Calculator
Enter your current grade as a percentage, then the weight of the work you have already completed and the weight of the final exam — the two weights must add up to 100%. Finally, enter the overall grade you are aiming for. The result updates live as you type and shows the exam score you need, plus the highest and lowest overall grades still possible. Use Reset to restore the example values.
Tips and Practical Advice
Check your syllabus before you trust the weights: some courses drop the lowest assignment, curve the final, or split the grade across a midterm and a project as well as the exam, and any of those change the answer. If the required score is above 100%, do not panic — ask your teacher whether extra credit is available, or set a realistic target and work out what it needs instead. And if the required score is low, resist the temptation to skip studying: the exam still counts toward your GPA, and a strong finish protects you against any marking surprises in the completed work.
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