Exam Marks Calculator with Negative Marking Presets
Score, percentage, accuracy and attempt rate from an answer-key tally, with SSC, NEET, JEE and RRB presets.
Fills in the standard marking scheme. Every field stays editable.
Enter 0 if there is no negative marking.
Count questions dropped by the board as correct.
Unattempted questions are not counted here.
Enter how many answers were right and wrong to compute your score.
This is a provisional score based on your own answer-key tally. The final score can differ if the board revises the key or drops questions after the objection window.
About this tool
When an answer key is released, the arithmetic is simple but the details trip people up. Different exams award different marks, deduct different fractions, and a wrong count of attempted questions throws the whole figure off. This calculator keeps the scheme in one place, does the subtraction and tells you what the paper would have looked like without the wrong answers.
Pick an exam preset and the tool fills the total questions, marks per correct answer and penalty per wrong answer. Every field stays editable, so a paper with a non-standard section or a changed scheme can still be scored. Type your correct and incorrect counts and the panel shows the score, the maximum, the percentage, the accuracy of your attempts and the share of the paper you attempted.
It is useful for SSC, railway, banking, UPSC and entrance-exam aspirants comparing a tally against the previous year's cut-off, and for anyone deciding whether their attempt strategy is costing marks.
How to use the marks calculator
- Choose your exam from the preset list. The tool fills total questions, marks per correct and penalty per wrong answer.
- Adjust any of those three fields if your paper differs. Set the penalty to 0 for an exam without negative marking.
- Enter the number of correct answers, counting any question the board dropped as correct.
- Enter the number of incorrect answers. Do not include blanks.
- Read the score, percentage, accuracy and attempt rate, then check the Working box for the plus and minus lines.
Marking schemes the tool supports
The calculation is the same for every exam. Score equals correct answers times marks per correct, minus incorrect answers times the penalty per wrong. Unattempted questions are the total minus correct minus incorrect, and they neither add nor deduct. The maximum score is total questions times marks per correct. Percentage is score divided by maximum, accuracy is correct divided by attempted, and attempt rate is attempted divided by total. If correct plus incorrect exceeds the total, the tool refuses to compute until the counts are fixed.
The presets are starting values drawn from the standard patterns of each exam, and they should be checked against the notification for your year. Two of them are stored to two decimals. UPSC Prelims uses a penalty of 0.66 per wrong answer, matching the one-third-of-2-marks rule the way UPSC states it, and the RRB preset fills 0.33 for a one-third deduction on a 1-mark question. Type 0.3333 in the penalty field if you want the RRB figure closer to the exact fraction.
- SSC CGL / CHSL Tier 1: 100 questions, 2 per correct, 0.5 per wrong
- NEET UG: 180 questions, 4 per correct, 1 per wrong
- JEE Main: 75 questions, 4 per correct, 1 per wrong
- CUET UG (per subject): 50 questions, 5 per correct, 1 per wrong
- UPSC Prelims GS Paper 1: 100 questions, 2 per correct, 0.66 per wrong
- RRB NTPC / Group D: 100 questions, 1 per correct, 0.33 per wrong
- IBPS PO / Clerk Prelims: 100 questions, 1 per correct, 0.25 per wrong
- Custom scheme: 100 questions, 1 per correct, 0.25 per wrong, meant to be edited
Worked example
Hypothetical: an SSC CGL Tier 1 candidate tallies 72 correct and 18 incorrect out of 100 questions, with the preset values of 2 marks per correct and 0.5 per wrong.
Positive marks are 72 times 2, which is 144. The deduction is 18 times 0.5, which is 9. The net score is 144 minus 9, so 135 out of a maximum of 200. Attempted is 72 plus 18, which is 90, leaving 10 blank. Percentage is 135 divided by 200, or 67.5 percent. Accuracy is 72 divided by 90, or 80 percent. Attempt rate is 90 divided by 100, or 90 percent.
The last line of the Working box shows 144 as the score if the wrong answers had been left blank, with the 9 marks lost shown beside it. That is the cost of the 18 guesses.
| Line | Working | Value |
|---|---|---|
| 72 correct x 2.00 | 72 x 2 | +144.00 |
| 18 incorrect x 0.50 | 18 x 0.5 | 9.00 deducted |
| Net score | 144 - 9 | 135.00 / 200 |
| Percentage | 135 / 200 | 67.50% |
| Accuracy | 72 / 90 | 80.0% |
| Attempt rate | 90 / 100 | 90.0% |
| Score if wrong answers were blank | 144 - 0 | 144.00 |
Reading accuracy and attempt rate together
The percentage tells you where you stand against the maximum. The other two stats tell you how you got there. A high attempt rate with low accuracy means guesses are eating into the score, and the score-if-blank line puts a number on that loss. A low attempt rate with high accuracy means marks were left on the table through caution.
In the example, 18 wrong answers cost 9 marks under SSC's 0.5 penalty. Under the NEET scheme of 4 and 1, the same 18 wrong answers would cost 18 marks against a 4-mark gain per correct, and under RRB's 1 and 0.33 they would cost 5.94 against a 1-mark gain.
Common mistakes
- Counting unattempted questions as incorrect, which applies a penalty the exam does not
- Leaving a dropped question out of the correct count, when boards usually award its marks to everyone
- Entering the overall penalty for a section as the per-question penalty
- Using a preset for a different tier of the same exam, for example an SSC Tier 2 paper with the Tier 1 values
- Comparing the score with a cut-off from a year when the scheme or question count was different
Limits of the estimate
The result is only as good as your tally against the provisional key. Boards revise keys and drop questions after the objection window, and some exams normalise across shifts before publishing a final score. The presets are editorial defaults stored to two decimals where the official fraction is recurring, so confirm them against the notification. All computation happens in your browser.
Treat the figure as a provisional raw score. The final marks on the scorecard can differ after key revisions, dropped questions and normalisation.
Frequently asked questions
›How is negative marking calculated?
Multiply your wrong answers by the penalty stated in the notification and subtract that from the marks earned on correct answers. For an SSC CGL Tier 1 tally of 72 correct and 18 wrong, that is 72 times 2 minus 18 times 0.5, or 144 minus 9, giving 135. Blank questions are never penalised. The tool shows each line of this working under the result.
›Do unattempted questions reduce my score?
No. In every scheme the tool supports, only incorrect answers carry a deduction, so a blank costs nothing beyond the marks you could have earned. You do not enter blanks anywhere. Type correct and incorrect counts, and the tool reports the remainder as left blank and uses it for the attempt rate. The score-if-blank line then shows what skipping the wrong ones would have saved.
›What is the difference between accuracy and percentage?
Percentage is your net score as a share of the maximum marks, so 135 out of 200 is 67.5 percent. Accuracy is the share of your attempted questions that were correct, so 72 out of 90 attempts is 80 percent. A paper can have high accuracy and a low percentage if you attempted little, or the reverse if you attempted everything and guessed a lot.
›How should I count a question the board dropped?
Add it to your correct answers. Most boards award the marks for a withdrawn question to all candidates, so counting it as correct brings your tally closer to the final score. Read the final answer key notice for your exam, because some boards award marks only to candidates who attempted the question, and adjust the count if that is the stated rule.
›My exam is not in the preset list. Can I still use the calculator?
Yes. Choose Custom scheme or any preset, then edit total questions (up to 500), marks per correct answer and penalty per wrong answer to match your notification. The penalty field accepts 0 for exams without negative marking and fractions such as 0.3333 for one-third deductions. The calculation is identical regardless of which preset you started from.
›Why does the RRB preset show 0.33 instead of one-third?
The preset stores the one-third penalty and fills the field to two decimals, so it appears as 0.33 and the tool computes with 0.33. Over 18 wrong answers that gives 5.94 instead of 6.00. If you want the exact fraction, type 0.3333 in the penalty field after choosing the preset. RRB also normalises scores across shifts, which the tool does not attempt.
›Is the score from this calculator my final result?
No. It is a provisional raw score from your own tally against the provisional answer key. The final score can change if the board revises the key, drops questions after objections, or applies normalisation across shifts, as SSC and RRB do. Use the figure to compare with previous cut-offs and to review your attempt strategy, and wait for the scorecard for the official marks.