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UPSC Mark & CSAT Calculator

Compute Prelims Paper-1 (GS) & Paper-2 (CSAT) scores with exact 1/3 negative marking penalties.

Marks gained
+130.0
Negative marking
−16.67
⅓ × 2 per wrong answer
Net score
113.33
Out of 200
Accuracy
72.2%
90 attempted

How this is calculated

Net = (65 × 2) − (25 × 2 × ⅓) = 113.33

Unattempted questions carry no penalty, and are used here to check the paper total and to compute the maximum available.

Recent GS Paper I cut-offs have fallen roughly between 75 and 100 marks.

UPSC Mark & CSAT Calculator: how it works

UPSC Prelims deducts one third of the marks allotted for every wrong answer. That penalty determines whether guessing is worth it.

The marking scheme

PaperQuestionsMarks eachPenalty per wrong
GS Paper I10020.667
CSAT Paper II802.50.833

Net score = (Correct × Marks) − (Wrong × Marks × ⅓)

Worked example

Worked example · 65 correct, 25 wrong, 10 unattempted in GS Paper I

Given

  • Correct: 65
  • Wrong: 25
  • Unattempted: 10

Working

  1. 1Gained = 65 × 2 = 130
  2. 2Penalty = 25 × 2 × ⅓ = 16.67
  3. 3Net = 130 − 16.67

Net score: 113.33 out of 200

Is guessing worth it?

With a one-third penalty, a guess breaks even when you are right 25 percent of the time. On a four-option question a blind guess is right exactly 25 percent of the time — so pure guessing is, on average, neutral rather than harmful.

CSAT is qualifying only

Paper II requires 66 marks out of 200 to qualify, and those marks do not count towards your merit position. Only GS Paper I decides whether you clear Prelims.

Recent GS Paper I cut-offs have varied considerably by year and category, so comparisons against past years are indicative at best.

Frequently asked questions

Each correct answer earns 2 marks in GS Paper I, and each wrong answer deducts one third of that, or 0.667. Unattempted questions carry no penalty.

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