Grading System in Thailand

Thailand GPA calculator

Grading scales:



Most Common

Grade Grade Description US Grade
A Excellent A
A- Very Good A-
B+ Very Good B+
B Good B
B- B-
C+ Fairly Good C+
C Fair C
C- C-
D+ Poor D+
D Very Poor D
F Failure F
AU Audit -
WF Withdrawal because of Failure -

4-point

Secondary School

Grade Scale Grade Description US Grade
4 75.00 - 100.00 Excellent A
3.5 AB
3 65.00 - 74.00 Superior B
2.5 BC
2 55.00 - 64.00 Satisfactory C
1.5 CD
1 50.00 - 54.00 Pass D
F 0.00 - 49.00 Fail F

Letter Grade (4 point)

Asian Institute of Technology

Chulalongkorn University

King Mongkut's University of Technology

Mahidol University

Grade US Grade
A A
B+ AB
B B
C+ BC
C C
D+ CD
D D
P S
F F




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