IAT Score Calculator 2027
Calculate your IISER Aptitude Test score from correct, incorrect and unanswered questions. The core calculator is free and requires no sign-up.
How IAT scoring works
The calculator currently follows the 2026 IAT marking reference: +4 for a correct answer, −1 for an incorrect answer and 0 for an unanswered question, with a maximum of 240 marks. If the 2027 official rules change, this page should be updated to match the new notification.