What score do I need on my final?

Most syllabi treat the final as one weighted piece of the course. If C is your current percent (excluding the final), D is the desired overall percent, and w is the final’s weight as a decimal, the course average is C·(1−w) + F·w.

Solve for the unknown final score F: F = (D − C·(1−w)) ÷ w. If F is above 100%, the target is impossible with the weights you entered; if F is at or below 0%, you already have the target even with a zero on the final.

F = (D − C × (1 − w)) ÷ w

What grade do I need on my final to get a certain overall grade?

Enter current percent C, desired overall D, and final weight w. The calculator solves F = (D − C·(1−w)) ÷ w—the minimum score on the final itself.

What does an impossible answer mean?

If required F exceeds 100% (or is negative), the math says the target cannot be reached with those weights—adjust the goal, confirm the weight, or raise C before the final.

Should I enter the final weight as 40 or 0.40?

Use the percent form printed on the syllabus (e.g., 40). The tool converts internally when solving the equation.

My final counts as a test, not a separate category—can I still use this?

Only after you rebuild your current average with the test category rules (drops, how many tests so far). Model that in the grade calculator, then paste the updated C here with the true share of remaining points.

Does this include extra credit?

Only if you bake extra credit into C before solving. Add those points in your gradebook math first.

Is a result under 0% or over 100% a bug?

No—those values are diagnostics. Below 0% means you already cleared the target; above 100% means the target is unreachable without changing inputs.

This is the classic “what do I need on my final?” workflow: current standing, target overall grade, and final weight from the syllabus.

• Enter your current course percent C (everything graded so far, without the final).
• Enter the desired overall percent D and the final weight w as printed on the syllabus (for example 40 for 40%).
• Read the required final score F and check whether it is reachable (0–100%).
• Re-run after any late assignment posts—C changes, so F changes.

• Week before finals: sanity-check whether your target is still reachable.
• Comparing “pass with a C” vs “keep a B” targets with the same current grade.

1. Example: C = 85%, D = 90%, w = 30% → F = (90 − 85×0.70) ÷ 0.30 = 101.7% (target unreachable without extra credit).
2. Same C = 85%, lower D = 88%, w = 30% → F ≈ 95%—tight but possible.
3. Gather C from your gradebook, D from your goal, and w from the final exam line on the syllabus.
4. Write w as the percent on the syllabus; the calculator converts it when solving.
5. If F exceeds 100%, adjust D, confirm w, or improve remaining non-final work first.
6. If your final counts inside a test category (not a separate weight), use category math in the grade calculator first, then bring the updated C here.

Same current grade and final weight; only the target changes—see how F jumps.