UPSC Prelims marks calculator gives you a practical result before the explanation. Enter the inputs in the tool above, read the result, and use the next action to improve one preparation decision.
The form is free, requires no account, and keeps personal entries in your browser unless the page explicitly says it is reading the published Anantam IAS question bank.
How this tool works
For GS Paper I, the tool awards 2 marks for a correct answer and subtracts two-thirds of a mark for an incorrect answer. For CSAT, it awards 2.5 marks and subtracts five-sixths of a mark. Skipped questions do not change the score.
What the result does not mean
The calculator does not estimate the official cutoff or your probability of clearing Prelims. The scenario rows are counterfactual review aids, not advice to attempt a fixed number of questions.
Source and verification
Scoring values follow the published UPSC Civil Services Preliminary Examination scheme. Method verified 26 July 2026.
Frequently asked questions
How much is the negative marking in UPSC Prelims?
One-third of the marks assigned to the question is deducted for an incorrect answer. That is about 0.667 in GS Paper I and 0.833 in CSAT.
Are unattempted questions penalized?
No. A question left blank does not receive a negative mark.
Does the calculator predict the Prelims cutoff?
No. Cutoffs vary by year, category and paper difficulty. This tool calculates marks and attempt quality only.