Target Overall Percentage Calculator
Enter the marks you have already scored, the marks still available and your target percentage. The calculator shows the minimum marks needed from the remaining assessments.
Calculate marks needed
Use this when completed and remaining marks are added directly into one final total.
Your marks stay in your browser.
How to Use the Target Percentage Calculator
Enter four values: the marks you have already obtained, the maximum marks for the work already completed, the maximum marks still available, and the overall percentage you want to finish with. Select Calculate Required Marks to see the minimum marks needed from the remaining work.
This calculator is designed for situations where completed and remaining marks are combined directly. For example, if you have completed 400 marks worth of exams and another 100 marks remain, your final total will be out of 500.
How to Calculate Marks Needed for a Target Percentage
First add the completed maximum and the remaining maximum to get the final maximum marks. Then calculate how many total marks correspond to your target percentage. Finally, subtract the marks you have already earned.
If the answer is greater than the marks still available, the target cannot be reached. If the answer is zero or negative, you have already secured enough marks to finish at or above the selected target even if you score zero in the remaining marks.
Target Percentage Formula
Final Maximum = Completed Maximum + Remaining Maximum
Target Total Marks = Final Maximum × Target Percentage ÷ 100
Marks Needed From Remaining = Target Total Marks − Marks Obtained So Far
When remaining marks are greater than zero, the required percentage on the remaining work is:
Required Remaining % = Marks Needed ÷ Remaining Marks × 100
Worked Example
Suppose you have scored 350 marks from 400 completed marks, 100 marks remain, and you want to finish with 80% overall. The final maximum is 400 + 100 = 500. An 80% target requires 400 marks in total. Because you already have 350, you need 50 more marks.
You therefore need 50 out of the remaining 100 marks, which is 50.00%, to finish with exactly 80.00% overall.
How Many Marks Do I Need for 75%?
If you have 330 marks from 400 completed marks and another 100 marks remain, the final maximum will be 500. A 75% overall target requires 375 marks. You already have 330, so you need another 45 marks. That means you need 45/100, or 45.00%, from the remaining assessments.
How Many Marks Do I Need for 80%?
With 350 marks obtained from 400 completed marks and 100 remaining, an 80% target requires 400 marks out of the final 500. You therefore need 50 of the remaining 100 marks. The required percentage on the remaining work is 50.00%.
How Many Marks Do I Need for 90%?
Suppose you have 430 marks from 500 completed marks, with 100 marks remaining. The final maximum is 600, so a 90% target requires 540 marks. You would need another 110 marks, but only 100 remain. The 90% target is therefore not reachable.
Your maximum possible result would be 530/600 = 88.33% if you scored all 100 remaining marks.
What If My Target Is Not Reachable?
If the marks mathematically required are greater than the marks still available, the calculator reports Target Not Reachable instead of displaying an impossible result such as 105/100. It also shows the highest overall percentage you can still achieve.
For example, 320/400 with 100 marks remaining and an 85% target would require 425 total marks. You need 105 more marks, but only 100 are available. Your maximum possible result is 420/500 = 84.00%.
What If I Have Already Reached My Target?
Sometimes the marks you already have are enough to keep your final overall result at or above the target even if you score zero in the remaining work. In that case the calculator shows Target Already Secured and sets the required remaining marks to zero.
For example, if you already have 420 marks from 450 completed marks, 50 marks remain, and your target is 80%, the final total is 500 and 80% requires only 400 marks. You already have more than that.
Why Required Marks May Be Rounded Up
The exact mathematical requirement can be a decimal, such as 74.40 marks. If your school or exam awards only whole marks, scoring 74 would leave you below the exact target. The calculator therefore also tells you to aim for at least 75 marks when a whole-mark recommendation is needed.
The exact decimal result is still shown because some assessments allow half marks or other decimal scores.
Can Remaining Marks Represent More Than One Exam?
Yes. If several upcoming exams, assignments or assessments are added directly into the same final marks total, enter their combined maximum as the remaining marks available. For example, if two exams are each out of 50, you can enter 100 as the remaining maximum.
Do not combine them this way if one assessment has a separate course weight instead of being added directly. In that situation, use the Final Exam Marks Needed Calculator or another weighting-based tool that matches the way your course is actually calculated.
Target Percentage vs Final Exam Grade
Use this Target Percentage Calculator when completed and remaining marks are added directly. If your final exam has a separate percentage weight — for example, it contributes 30% of the course — use the Final Exam Marks Needed Calculator instead.
The two tools answer different questions. This page works from raw completed marks plus raw remaining marks; it does not add a final-exam weighting field.
Common Calculation Mistakes
- Using only the current percentage instead of the actual marks already obtained.
- Forgetting to add the remaining maximum marks to the final total.
- Calculating the target percentage only from completed marks.
- Rounding the required marks down instead of up when whole marks are required.
- Assuming an impossible target can still be achieved.
- Entering obtained marks greater than the completed maximum.
- Confusing raw-mark targets with weighted final-exam grades.
- Confusing percentage with percentile.
Frequently Asked Questions
How do I calculate the marks needed for a target percentage?
Add completed and remaining maximum marks, multiply that final total by your target percentage, and subtract the marks you have already obtained.
How many marks do I need for 75% overall?
It depends on your completed marks and remaining marks. Enter those values with a 75% target to calculate the exact requirement.
How many marks do I need for 80% overall?
Enter your current obtained marks, completed maximum and remaining maximum, then set the target to 80%.
How many marks do I need for 90% overall?
The calculator will show the marks required and will also tell you if 90% is no longer mathematically reachable.
What if the calculator says my target is not reachable?
It means the required marks are greater than the marks still available. The calculator also shows your maximum possible overall percentage.
What if I have already reached my target?
The required remaining marks are shown as zero, together with the overall percentage you would still have if you scored zero in the remaining marks.
Should required marks be rounded up?
If only whole marks are awarded, yes. A requirement of 74.40 means you should aim for at least 75 marks.
Can I enter decimal marks?
Yes. Decimal marks are supported.
Can remaining marks represent multiple exams?
Yes. Enter their combined maximum if those marks are added directly into the same final total.
Does this calculator determine whether I pass?
No. Passing rules depend on the institution, course and assessment structure.
Are my marks uploaded anywhere?
No. The calculation runs locally in your browser.
Sources & Methodology
This calculator uses standard percentage mathematics rather than a university-specific academic rule. It calculates the target total, subtracts marks already earned, checks the result against the remaining marks, and rounds upward only for the optional whole-mark recommendation.
Current calculator websites were reviewed to confirm common user intent such as target marks, reachability checks, current percentage and whole-mark rounding. CentralPortal keeps the visible tool limited to the four values needed for this calculation.
Last reviewed: 11 September 2026.