📝 Final Grade Calculator

How the Final Grade Calculator Works

Enter your current grade in the course (before the final), how much the final exam is worth as a percentage of the total grade, and the overall grade you are aiming for. The calculator works out the minimum final exam score needed.

It also shows a "what if" table: the overall grade you would end up with for a range of final exam scores, so you can see how much each extra point on the final is worth. All values are percentages, so it works with any grading scale that can be expressed out of 100.

Formula

Required final score = (Target grade − Current grade × (1 − w)) / w
where w = final exam weight as a decimal (e.g. 30% → 0.30)
Overall grade = Current grade × (1 − w) + Final score × w

Example: current grade 78%, final worth 30%, target 80% → (80 − 78 × 0.70) / 0.30 = 84.7% needed on the final.

How to Use It

1. Enter your current course grade as a percentage.
2. Enter the weight of the final exam (percentage of your total grade).
3. Enter the overall grade you want to achieve.
4. Read the score you need on the final, then check the what-if table.

Frequently Asked Questions

How do I calculate what I need on my final exam?

Use: required score = (target − current × (1 − weight)) ÷ weight, with the weight as a decimal. For a current grade of 85%, a final worth 20%, and a target of 90%: (90 − 85 × 0.8) ÷ 0.2 = 110%, which means the target is not reachable with the final alone.

What if the result is over 100%?

It means the target grade cannot be reached even with a perfect final exam score, unless there is extra credit. The what-if table shows the best overall grade you can still achieve.

What is my current grade if some work has not been graded yet?

Use the grade calculated from the work graded so far, as shown in your course portal. This calculator assumes the final is the only remaining graded item.

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Formula and content last reviewed: September 2026. All calculations run in your browser — nothing you enter is sent to or stored on our servers.