Final Grade Calculator
Enter your current grade, the grade you're aiming for, and how much your final exam counts to find the exact score you need on the final.
The final exam is often the last chance to move your grade, and it usually carries more weight than a single homework or quiz. This calculator uses the standard weighted-average formula to tell you exactly what you need to score on the final to reach the grade you want — and whether that target is even possible.
How to calculate what you need on the final
Your final course grade is a weighted average of everything you've already done and the final exam. If the final is worth a fraction w of your grade, then the rest of your work counts for the remaining (1 − w). Rearranging that relationship gives the score you need on the final:
where w = final exam weight ÷ 100
| Variable | What it means | Example |
|---|---|---|
| Current grade | Your grade so far, before the final | 88% |
| Goal | The final course grade you want | 90% |
| Weight (w) | Share of the grade the final is worth | 20% → 0.20 |
Worked example
You currently have 88%, you want to finish with 90%, and the final is worth 20% of your grade:
| Needed = (90 − 88 × 0.80) ÷ 0.20 | 98% |
| = (90 − 70.4) ÷ 0.20 | 98% |
So you'd need a 98% on the final. That's a demanding target — which is exactly why the calculator also shows the highest grade you could still earn (if you scored 100% on the final) and the score you'd need just to pass.
What grade do you need to pass?
Swap your goal for the passing mark (often 60%, sometimes 50% or a letter D). If the "needed" score comes out at or below 100%, passing is still in reach. If it comes out above 100%, no score on the final can get you there. The table below shows how the required final score changes with the exam's weight, assuming an 88% current grade and a 90% target.
| Final is worth | Needed for 90% goal |
|---|---|
| 10% | 108% (not possible) |
| 20% | 98% |
| 30% | 94.7% |
| 40% | 93% |
| 50% | 92% |
Notice that the more the final is worth, the more a strong final can pull your grade up — but the more a weak one can drag it down.
Tips for using your target score
Once you know the number, use it to plan. If you need a very high score, prioritise the topics with the most marks and practise past papers under timed conditions. If the required score is comfortably low, you can protect your grade by revising your weakest areas rather than chasing perfection. And if the target is impossible, talk to your instructor early about extra credit or reweighting — options that usually disappear after the exam.