UPSC Prelims 2026
Score Calculator
Calculate your UPSC Prelims 2026 score against the UPSC Official Answer Key (provisional) and keys from Forum IAS, PW Only IAS, Study IQ IAS, ThinQ IAS, Unacademy and more — all in one place.
Your result · Set B · 2026
Optimistic
166 / 200
UPSC Official Key
Provisional157
159 opt.
Forum IAS
161
166 opt.
PW Only IAS
158
164 opt.
Study IQ IAS
154
162 opt.
ThinQ IAS
157
163 opt.
🏛 Official UPSC key now available — provisional, may be revised. ⚡ Disputed questions may be awarded to all.
How it works
Three steps. Five minutes.
Your UPSC Prelims 2026 score across every major institute — instantly.
Choose your exam
Select GS Paper 1 or CSAT Paper 2 from the calculator. For GS Paper 1, also pick your question paper set (A, B, C, or D). Each exam is calculated separately.
Enter your answers
Mark what you selected for each question — A, B, C, or D. Leave blank for unattempted questions. Takes about 5 minutes per paper.
Get your score instantly
GS Paper 1: see your score across every institute's key side-by-side. CSAT: see your qualifying score. Your attempt is saved — revisit anytime.
Marking scheme
UPSC Prelims 2026 — Both Papers
Both GS Paper 1 and CSAT Paper 2 use MCQ format with negative marking. Koach calculates scores for both.
Maximum marks:200 · Duration:2 hours · Negative marking:−2/3 per wrong answer · Counts for merit ranking
Maximum marks:200 · Duration:2 hours · Negative marking:−1/3 per wrong answer · Qualifying paper — minimum 33% (66.67 marks) required; does not count for merit ranking
Features
What makes this calculator different
Most answer key tools show one institute. Koach shows all of them — and flags where they disagree.
Official UPSC key + all institutes
Now includes the UPSC Official Answer Key (provisional) alongside coaching institute keys — all in one view. The official key is pinned at the top.
Normal vs optimistic score
Normal score counts matched answers only. Optimistic score awards full marks on disputed questions — since UPSC sometimes marks them correct for all.
Disputed question detection
See exactly which questions are disputed — where institutes disagree. These are most likely to be awarded to all by UPSC.
Question-by-question review
Expand any institute card for a full breakdown of correct, wrong, blank, and disputed questions. Works for both GS Paper 1 and CSAT Paper 2.
All sets supported (A, B, C, D)
Select your set and the calculator maps your answers to the correct key automatically, even when an institute only published Set A.
Saved attempt
Your answers are saved to your account. Come back when more institute keys are uploaded — your score updates automatically.
Disputed questions
When institutes disagree
Every year, several UPSC Prelims questions are disputed — different coaching institutes give different correct answers. This happens when a question is ambiguous, poorly worded, or contested on factual grounds.
UPSC sometimes responds by awarding full marks to all candidates on such questions, regardless of what they marked. This can swing your score by several marks.
Koach shows you exactly which questions are disputed and calculates an optimistic score — assuming UPSC awards marks to all on disputed questions. Your actual score will land between normal and optimistic.
Example — Question 47
This question is flagged as disputed. If you attempted it, it counts as correct in your optimistic score.
Key facts
UPSC Prelims 2026 — at a glance
FAQ
Frequently asked questions
Everything UPSC aspirants are asking about the 2026 Prelims answer key.
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Know your UPSC Prelims 2026 score
in 5 minutes
Compare against all major coaching institutes — instantly. Your attempt is saved.