What do I need on a final worth 40% to get a B?
When the final is worth 40%, it is less an exam than a second chance at the whole course. From 74%, a B needs a 96.5 — steep, but the arithmetic is on your side in a way it never is with a light final: nearly half your grade is still unwritten.
Common plus/minus convention; many schools use straight letters or different cut points.
You need 96.5% on the final.
That is within reach — the final is worth 40% of your grade.
🔢 Show the math
- Work graded so far covers 60% of the course; 40% is still to come.
- Points already banked: 74% × 60% = 44.4 points of the 100 available.
- To finish at 83% you still need 38.6 points from the remaining 40%.
- 38.6 ÷ 40 × 100 = 96.5% on what is left.
What you need, at every current grade
With a final worth 40% of your course grade and a B (83% on a plus-minus scale) as the goal, this is the score you need on the final from each starting point:
| Current grade | You need on the final | Reachable? |
|---|---|---|
| 85% | 80.0% | Yes |
| 80% | 87.5% | Yes |
| 76% | 93.5% | Yes |
| 74% | 96.5% | Yes |
| 70% | 102.5% | Not with this final alone |
| 64% | 111.5% | Not with this final alone |
Grading scales vary by institution — your school's own table and syllabus govern. Conversions shown here follow common published conventions.
Frequently asked questions
How much can a 40% final change my grade?
By a lot in both directions. Going from a 60 to a 95 on it moves your course grade by fourteen points, which is several letter grades. That is exactly why heavy finals feel high-stakes: they genuinely are, and the risk runs both ways.
What is the worst this final can do to me?
Scoring zero would leave you at 60% of your current average — from 74 that is 44.4. The calculator shows this as the "worst" figure, and it is worth looking at once: with a heavy final, protecting your grade matters as much as improving it.
Should I prioritise this course over ones with lighter finals?
Usually yes, if the numbers are close. An hour spent on a 40% final moves your grade roughly four times as much as an hour on a 10% one, so when time is short the heavy exam is where it buys the most — assuming you are not already safe in it.
Why are some finals worth so much?
Cumulative examinations in subjects that build on themselves — mathematics, languages, law — are often weighted heavily because the final is the only assessment covering the entire syllabus. It is a design choice about what the course is testing, not a trap.
Other targets
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