The Iranian grading system is similar to that of France's and other French-patterned grading systems such as Belgium, Lebanon, Venezuela, and Peru in secondary schools and universities. Since a grading guideline is not provided by the Iranian Ministry of Education, conversion to the international scales is carried out using conversion guideline provided for French-patterned grading systems. In specific cases, grades are converted according to the destination institutes' grading policy. The passing grade is 10 and usually a grade of more than 14 out of 20 is considered excellent. The following table is most commonly used by world institutes and universities to convert from the Iranian grading system:[1]
| 14–20 | A | "Upper Class Honors": 1 | |
| 12–13.99 | B | "Second-Class Honors": 2:1 | |
| 10.1–11.99 | C+ | "Lower Second-Class Honors": 2:2 | |
| 10 | C | "Third-Class Honors": 3rd | |
| 9–9.99 | C− | "Third-Class Honors": 3rd | |
| 8–8.99 | D | "Third-Class Honors": 3rd | |
| 0–7.99 | F | - |
The above table does not corroborate with the scale most U.S. and Canadian institutions use where a grade between 18-20 scale to an "A," 15-17 scale to a "B," 12-14 scale to a "C," a grade between 10-11 is treated as a "D," and a score below 10 is considered a failing grade. [2]
The above is also noted in the Scholaro Database.[3]