Tamil Nadu 12th Grading System 2026: Check Total Marks, Marking System, Calculate Percentage

Roumik Roy

Updated on - Oct 16, 2025

Table of Contents

Tamil Nadu 12th Grading System 2026
How to Calculate Percentage from Class 12th Grades?
Tamil Nadu Class 12th Grading System: Important Pointer
Tamil Nadu Class 12th Marking System
Tamil Nadu Class 12th Passing Marks

Tamil Nadu 12th board follows a 10-point scale grading system, and the grades are awarded on a scale of A1 to E1. Students scoring between 91-100 will be given an A1 grade and a grade of 10. The lowest grade is E1 for marks scored between 21 to 34, considered not qualified or failed.

To pass the TN 12th board examination, students must score 35 marks in each subject. The grade for 35-40 marks is D, and the grade point is 4. Read the complete article to understand the grading system, marking criteria, passing marks and more.

Tamil Nadu 12th Grading System 2026

The Directorate of General Education, Tamil Nadu (TNDGE) has designed the following grading system for the Tamil Nadu 12th board examination. Students are awarded grades based on the following pattern:

Grade	Equivalent Marks Range	Equivalent Grade Point
A1	91-100	10
A2	81-90	9
B1	71-80	8
B2	61-70	7
C1	51-60	6
C2	41-50	5
D	35-40	4
E1	21-34	-

How to Calculate Percentage from Class 12th Grades?

Tamil Nadu class 12th grade percentage can be calculated using the following methods:

Add the marks of all the subjects you scored in the final TN 12th exam.
Divide the sum obtained by adding the marks of all the subjects by the total marks.
Now multiply the product by 100 to get the percentage you scored on the board.

Tamil Nadu Class 12th Grading System: Important Pointer

Tamil Nadu 12th result marksheet mentions subject-wise theory and practical scores, internal marks scored in each subject, grades and total marks.
Students check their marksheets and contact the school authority if they notice any errors or discrepancies.
Students can apply for the re-totalling of marks if a discrepancy is found.

Tamil Nadu Class 12th Marking System

Tamil Nadu 12th board follows the marking criteria framed by the DGE Tamil Nadu. An overview of the marking system has been provided below:

The question paper of the Tamil Nadu 12th board has four sections consisting of MCQs, short and long answer type questions.
Section A of the question paper has 15 MCQs, each carrying 1 mark with no negative marking.
Section B consists of 12 questions of 2 marks each. Her,e students need to answer very short answer-type questions.
Section C has 6 questions in total, and each question carries 3 marks. Students will be asked to answer short-answer-type questions.
Section D consists of long-answer type questions and students need to attempt 5 questions, each carrying 5 marks.

Tamil Nadu Class 12th Passing Marks

Students must score at least 35 marks in each subject to clear the TN 12th exam 2026. The theory paper has 70 marks for subjects with ppracticalscals and the practical test is allotted 20 marks. The remaining 10 marks are for internal assessment. The passing marks for each subject, including vocational, are given below:

Subject	Total Marks	Pass Marks
Physics	100	35
Chemistry	100	35
Biology	100	35
Mathematics	100	35
Language Subjects	100	35
Economics	100	35
Accountancy	100	35
Political Science	100	35
History	100	35
Geography	100	35
Vocational Subject Practicals	75	20