Typically when an American educational institution requests a grade-point average (GPA) calculated on the 4 point scale, the student will be expected to do a direct mathematical conversion, so 10 becomes 4.0, 7.5 becomes 3.0, etc.
The practice of most Vietnamese colleges is not to provide official transcripts to other universities on behalf of their students.
Standardized Table to Convert University GPAs Some universities in Vietnam employ a system of standardized credit hours, which can translate directly over to the U.S. system.
Each class grade point is evaluated according to the native Vietnamese system, converted to A, B, C, D, F, and the individual class grade is translated to the 4.0 system.
The original article can be found at the U.S. Embassy's Education USA office located at: 1st Floor, Rose Garden Tower, 170 Ngoc Khanh St., Hanoi, Vietnam https://photos.state.gov/libraries/vietnam/8621/pdf-forms/VN-Grading-System.pdf High schools seem to use a slightly modified GPA system, with higher criteria to receive the equivalent grading letter scale.