Use this guide with a free ScanScore resource
- Negative marking calculator — See your score, deductions and accuracy, with NEET and JEE Main presets.
The quickest way to understand a negative marking scheme is to try one. The negative marking calculator takes the number of correct, wrong and unanswered questions and returns the score, the deductions and the accuracy. This guide shows how to read the result and when to move from a calculator to an app that applies the rule for you.
What you enter
- Correct, wrong and unanswered questions from a mock test.
- A preset — NEET UG, JEE Main — or a custom rule.
- The penalty, fixed or fractional.
A worked example
On a +4 / −1 test, a student with 90 right, 30 wrong and 60 unanswered scores 90 × 4 − 30 × 1 = 330. The 60 unanswered questions add nothing and cost nothing. Accuracy (right as a share of attempted) is 90 ÷ 120 = 75%. Those three numbers — score, deductions, accuracy — tell a student far more than a total alone.
Fixed or fractional penalty
A fixed penalty subtracts the same number from every wrong answer. A fractional penalty subtracts a share of that question’s own marks, so a paper with mixed marks stays correct. Both are explained in negative marking for OMR exams.
From one score to a whole class
A calculator is great for one student. For forty sheets, apply the rule at scan time: ScanScore marks every sheet with the penalty already applied and keeps decimals exact. Install ScanScore (free, no scan limit) and set the penalty once per exam. If you change the rule later it offers to re-mark saved sheets.