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Final exam grade calculator: what do I need on my final?

  

Your current grade is the weighted average of everything before the final, out of 100.

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You need on the final

84.7%

Score at least 84.7% on the final.

How we got this

  1. The rest of the course counts 70%: 78 × 0.7 = 54.6.
  2. Points still needed: 80 − 54.6 = 25.4.
  3. Divide by the final's weight 0.3: 84.67%.

How the final moves your grade

Your course grade is a weighted average: everything so far counts (1 − w) and the final counts w. Fix the overall grade you want and solve for the final. A heavy final gives you room to recover; a light one means the result is mostly set already.

Plan the revision with the exam countdown, which splits the days you have left into study hours. For a whole term, the GPA calculator shows how one course changes the overall figure, and the percentage calculator turns marks into a percent.

Sources

What this calculator does not account for

  • Curves, extra credit or minimum-score rules in your course.
  • Weights that differ from the ones you enter.

How this is calculated

Formula: Solve the weighted average for the final

needed =(target − current × (1 − w)) ÷ w

What the symbols mean

  • currentYour grade so far, in percent.
  • wThe final's weight as a decimal: 30% is 0.3.
  • targetThe overall grade you want.

Good to know

  • Above 100% means the target cannot be reached without extra credit.
  • Below 0% means you already have it.

Read the full methodologyFound an error? Contact us

Worked examples

Each example is worked out by the same code as the calculator above.

Getting to 80

78% now, final worth 30%: 78 × 0.7 = 54.6. 80 − 54.6 = 25.4. 25.4 ÷ 0.3 = 84.7% on the final.

Holding a pass

62% now, final worth 40%, pass at 50%: (50 − 37.2) ÷ 0.4 = 32% on the final.

Embed this calculator

The frame shows the tool only.

<iframe src="/embed/final-grade" title="Final grade needed" width="100%" height="720" style="border:0;max-width:42rem" loading="lazy"></iframe>

Questions

What do I need on my final to get an 80?

With 78% now and a final worth 30%: (80 − 78 × 0.7) ÷ 0.3 = 84.7%.

What if the answer is over 100%?

The target is out of reach with this final alone. Lower the target or ask about extra credit.

What if I do not know my current grade?

Work it out from the graded parts with their weights, or use the GPA calculator with weights in place of credits.