Final Grade Calculator (What Do I Need on the Final?)
Final grade calculator: the score you need on the final exam to reach your target grade, given your current grade and the exam weight.
f = g − c · (1 − w)w
How to use this calculator
- Choose the quantity you want under “Solve for”.
- Type the known values and pick their units: any combination works.
- The result updates as you type. Open “Show the steps” to see the substitution.
Course grade = current × (1 − weight) + final × weight. Solve for the final score you need.
A result above 100 % means the target is out of reach with this exam alone.
Formula
f = g − c · (1 − w)w
| Symbol | Quantity | Units |
|---|---|---|
| c | Current grade | %, × |
| w | Final exam weight | %, × |
| g | Target course grade | %, × |
| f | Score needed on the final | %, × |
Worked example
Given: c = 85 % · w = 30 % · g = 90 %
f = g − c(1 − w)w
Result: f = 101.667 %
Score needed on the final for different values of Current grade
| c · Current grade | f · Score needed on the final |
|---|---|
| 42.5 % | 200.83 % |
| 63.75 % | 151.25 % |
| 76.5 % | 121.5 % |
| 85 % | 101.67 % |
| 93.5 % | 81.833 % |
| 106.3 % | 52.083 % |
| 127.5 % | 2.5 % |
| 170 % | -96.667 % |
Other values as in the worked example.
Frequently asked questions
Current 85 %, final worth 30 %, target 90 %?
You need about 101.7 % on the final.
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