Answer Key Calculator: Check Your Score with Negative Marking
This answer key calculator turns the number of correct and wrong answers into an exact score using each exam's marking scheme: JEE Main and NEET (+4 / −1), SSC CGL (+2 / −0.5), RRB Group D (+1 / −⅓), DSSSB (+1 / −0.25) and CTET, or any custom scheme. It also shows accuracy and how many marks negative marking cost.
By Umer Sattar Updated 21 Oct 2026
JEE Main (75 Qs, +4 / −1)
198 / 300
- Percentage
- 66%
- Unattempted
- 13
- Lost to negatives
- 10
- Accuracy
- 83.9%
Answer key calculator formula: marking schemes explained
Score = (correct × marks per question) − (wrong × negative marks) Unattempted questions score zero
| Exam | Questions | Correct | Wrong | Maximum |
|---|---|---|---|---|
| JEE Main (Paper 1) | 75 | +4 | −1 | 300 |
| NEET UG | 180 | +4 | −1 | 720 |
| SSC CGL Tier 1 | 100 | +2 | −0.5 | 200 |
| RRB Group D | 100 | +1 | −⅓ | 100 |
| DSSSB | As per post | +1 | −0.25 | As per post |
| CTET | 150 | +1 | 0 | 150 |
Should I attempt a question I'm unsure about?
With +4/−1 marking, a guess between two options is worth taking on average (expected value +1.5); a blind guess among four is roughly neutral (+0.25). With −1/3 on a +1 question (Group D), a blind guess among four averages zero.
How to use the answer key calculator
- Download the official provisional answer key and your response sheet from the exam website once released.
- Count the correct and wrong answers by comparing the two.
- Choose the exam in the calculator (or Custom) and enter the counts.
- Read the score, percentage, accuracy and marks lost to negative marking.
Coaching teachers in Kota, Patna and Delhi's Mukherjee Nagar do exactly this for students the evening an answer key drops, because the score decides whether to file an objection against a key answer before the deadline.
Answer key calculator by PDF or URL
Some tools read an answer-key PDF or response-sheet URL automatically. This calculator deliberately asks only for counts: no login, no uploading the response sheet, and no personal data leaves the phone. Counting takes a few minutes and is error-free if the answers are ticked off question by question.
Exam-specific tips
- JEE Main: score out of 300; NTA converts it to a percentile per session. Use the JEE Mains score calculator for percentile-to-rank.
- NEET UG: dropped or bonus questions after the final key give marks to everyone who attempted them; re-check after the final key.
- SSC and Group D: normalisation across shifts can move the final marks a little above or below the raw score.
- DSSSB: the number of questions differs by post; use Custom if the preset doesn't match.
Answer Key Calculator: questions people ask
How does the answer key calculator for JEE Main work?
Score = correct × 4 − wrong × 1, out of 300 for 75 questions. Enter the counts from the official answer key.
What is an answer key calculator by PDF?
A tool that reads the response sheet PDF automatically. This calculator asks for counts instead, so nothing personal is uploaded.
Is there an answer key calculator for DSSSB?
Yes: choose DSSSB (+1 / −0.25) or set a custom scheme to match the post's question paper.
How do I use the answer key calculator for Group D?
Choose RRB Group D (+1 correct, −⅓ wrong, 100 questions) and enter the correct and wrong counts.
Is my calculated score final?
No. Final scores can change after objections, the final answer key and normalisation across shifts.