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Final Grade Calculator

A final grade calculator: find the score you need on your final exam to finish the class with the grade you want, or see your grade after the final.

Checked Oct 18, 2026 Runs in your browser No sign-up

Work out

Result

You need on the final

87.33%

Reachable: score 87.33% or more to finish with 85%.

To finish the class with

90%
104%
80%
70.67%
70%
37.33%
60%
4%

Worked out in your browser. Nothing you type is sent to us.

What do I need on my final?

Take the grade you want, subtract what your work so far already gives you (your current grade × the share of the class that isn't the final), and divide by the final's weight. With 84% now and a final worth 30%, you need 87.33% on the final to finish with 85%.

Needed = (target − current × (1 − final weight)) ÷ final weight

Worked example: 84% now, final worth 30%

  1. What you keep: everything but the final is 0.70 of the grade, so 84 × 0.70 = 58.80 points are already yours.
  2. What's missing: 85 − 58.80 = 26.20 points must come from the final.
  3. Score needed: 26.20 ÷ 0.30 = 87.33%.

For other targets: 104% to finish with 90%, 70.67% for 80%, 37.33% for 70%. Even a perfect 100% on this final would give 88.8%.

If you need more than 100%

When the score needed is above 100%, that grade is out of reach unless the final can be scored above 100% (with extra credit, for example). The calculator shows what you would finish with on a perfect final, so you can see the best grade still possible. Ask your teacher about extra credit or a curve before the exam rather than after.

Where to find the numbers

Your grade now is in your school's grade portal (Canvas, PowerSchool, Blackboard or similar). The final's weight is in the syllabus, for example "Final exam 20%". If your class is graded by categories, work out your current grade with the weighted grade calculator first.

Questions students ask

What if my final replaces my lowest test score?
Then the simple formula doesn't apply, because the final changes two parts of your grade at once. Use the weighted grade calculator: enter your categories with the final in place of the dropped test, and try different scores.
My class is graded in points, not percentages. What do I enter?
Use percentages: your current grade is points earned ÷ points possible so far, and the final's weight is its points ÷ the total points for the class. A 200-point final in a 1,000-point class is worth 20%.
Does this calculator round my grade?
It shows up to two decimals, so 89.96% is never shown as 90%. Your teacher may round 89.5 up to 90 or not: check the syllabus, and aim a little above the line if you can.

Sources and method

  • Formula. A weighted average of two parts: class grade = current grade × (1 − final weight) + final score × final weight, solved for the final score.

Last checked October 18, 2026. How every calculator is built and tested: methodology.