Combine sections with different marks and penalty rules using the inputs on this page.
Study & Grades
Calculate marks after negative marking
Enter correct and wrong answers, then apply a 1/2, 1/3, 1/4, custom-fraction or fixed penalty rule.
Calculation breakdown
This calculator assumes one mark value and one penalty rule for every question. Check the official paper rules for section-specific marks, canceled questions, multiple-correct answers, bonus marks or score floors.
Combine sections with different marking rules
Use one row per distinct scoring rule. Illustrative rows are prefilled; replace or remove them. Fraction deductions apply to the marks per correct answer; fixed deductions are marks themselves.
Score one marking rule or combine different sections
The original form scores questions with one correct-answer mark value and one wrong-answer penalty. Use the section combiner when those values differ. Keep each distinct rule in its own row, including a separate row for questions with no wrong-answer deduction.
For each rule: raw score = correct × marks per correct answer − wrong × deduction per wrong answer. Maximum marks equal total questions × marks per correct answer. Unattempted questions equal total − correct − wrong and receive zero marks in these tools.
For a fractional deduction, multiply the positive mark value by the fraction. A two-mark question with a 1/3 penalty loses 2/3 mark per wrong answer. In fixed mode, a deduction of 0.5 means half a mark regardless of the positive mark value. Enter zero in fixed mode for questions without a penalty.
Worked example with two rule sets
The illustrative section rows use these assumptions; they are not an exam preset.
| Section | Total / correct / wrong | Reward and penalty | Raw score |
|---|---|---|---|
| A | 50 / 30 / 10 | +1; deduct 1/4 of 1 | 30 − 10/4 = 27.5 |
| B | 50 / 35 / 10 | +2; deduct 1/3 of 2 | 70 − 20/3 = 190/3 |
Combined score: 545/6 ≈ 90.833333 marks out of 150, or approximately 60.555556%. There are 15 unattempted questions. Adding section percentages instead of section marks would give the wrong overall percentage when their maxima differ.
The combiner retains decimal inputs and fractions as exact rational values. Its displayed decimals use at most six places, so a displayed value alone can conceal a small difference. The exact combined score and exact section raw scores are also shown.
Choose the correct floor rule
A zero floor can mean two different operations. For section scores of −10 and +5, allowing negative scores gives −5; flooring only the combined paper gives 0; flooring each section before summing gives 5. These results are not interchangeable. The default allows negative raw scores. Choose another treatment only when it matches the published rules.
Appending the original form creates a snapshot of its question counts, positive marks and penalty. It does not import its score-floor setting. Repeated imports append repeated sections, so remove any duplicate before combining. Later changes in the original form do not update an imported row.
Read accuracy separately from score percentage
Accuracy is correct ÷ attempted × 100; attempt rate is attempted ÷ total × 100; score percentage is scored marks ÷ maximum marks × 100. With 60 correct and 20 wrong in a 100-question paper, accuracy is 75% and attempt rate is 80%. Neither is the negative-marked score percentage. When no questions were attempted, accuracy is undefined rather than 0%.
Input checks and limits
Use 1–20 section rows. Each needs 1–1,000,000 total questions, whole nonnegative correct and wrong counts, correct + wrong no greater than total, and positive correct-answer marks. Enter an explicit zero for a zero count or deduction; blanks are incomplete. Plain decimal inputs accept up to 18 decimal places. Fraction mode uses numerator/denominator with a positive denominator.
The combiner sums marks directly. It does not apply separate section weights, qualifying-only exclusions, partial credit, multiple-correct scoring, unanswered-question penalties, bonus questions, dropped questions, normalization, rank or cutoffs. Do not combine a qualifying-only paper into a merit total unless the official rules include it. These tools cannot import a response sheet or verify an answer key.
Check the current exam instructions
Use the current official notification or marking instructions for rewards, deductions, blank answers and floor rules. The National University’s archived admission-test guide illustrates why section question weights and negative-marking settings must be read separately; its 2003–2005 publication is not a current exam scheme.
A guessing break-even calculation, P ÷ (R + P), assumes reward R, wrong-answer deduction P and zero for leaving the question blank. It describes expected marks over repeated comparable decisions, not a guaranteed gain on a particular question. The score tools calculate entered outcomes and give no guessing recommendation.
For a percentage from already-known marks, use the Marks Percentage Calculator. For marks still needed from remaining work, use the Required Marks Calculator. Calculations run in the browser; entered rows are not saved as an exam record.