To find the mark you need on your final, subtract the points you already have toward your target from the target itself, then divide by the final’s weight. The formula is: needed score = (target – current average x (1 – final weight)) / final weight.
How do you calculate the grade you need on a final exam?
Suppose your coursework is worth 60% of the course and you have a 78% average on it. The final is worth the other 40%. You want an overall 85%.
Needed score = (85 – 78 x 0.6) / 0.4 = (85 – 46.8) / 0.4 = 38.2 / 0.4 = 95.5%
That is a big ask, which is exactly what you want to know in October, not on the morning of the exam.
| Target overall grade | Needed on the final (78% coursework, 60/40 split) |
|---|---|
| 70% | 58.0% |
| 75% | 70.5% |
| 80% | 83.0% |
| 85% | 95.5% |
| 90% | 108.0%, not possible |
If the answer is above 100%, the target is out of reach in that course, and the useful move is to pick a realistic target or look at where else you can recover marks.
How do you calculate what you need on remaining assignments?
When the remaining work counts equally, use this: needed average = (target x total number of assignments – sum of marks so far) / assignments left.
Example: you have scored 70, 72 and 74 on three of five assignments, a total of 216, and you want a 75 average. You need (75 x 5 – 216) / 2 = 159 / 2 = 79.5 on each of the last two.
How do you work out the GPA you need?
Use the credit-weighted version: needed average = (target GPA x final credits – current GPA x current credits) / remaining credits. With a 3.40 after 60 credits and a 3.50 target after 90 credits, you need 3.70 across the next 30 credits. Saving for College has more on credit-weighted GPA, and we walk through a full example in our GPA guide.
How does this work for a UK degree?
The same idea applies across the year weightings of a UK degree. With a 40/60 split and a 64% year 2 average, you need about 74% in final year for a First. The boundaries are listed by Prospects, and our UK degree classification guide works through the rest.
What mistakes should you avoid?
- Using the wrong weighting. Check the syllabus for the final’s exact percentage.
- Forgetting that some courses round at a boundary, and others do not.
- Treating a predicted mark as a final one.
- Ignoring minimum pass requirements on the exam itself, which some courses set separately.
How can you keep your target visible?
A calculation is only useful if you act on it. In MyStudyLife you can log scores as they land, see the trend by subject, and add revision tasks to each exam so the preparation is scheduled. Use a revision timetable to spread the effort across weeks, and parents can see the exam dates through Family Connect.
FAQ
What is the formula for the grade I need on a final?
Needed score = (target – current average x (1 – final weight)) / final weight.
Can I still pass if I fail the final?
It depends on the course. Check whether the exam has its own minimum mark.
Does this work with letter grades?
Convert letters to percentages or grade points first, using your school’s scale.
Related reading: How to calculate GPA | IB score tracker | Study Tips
See also: Final exam calculator
