The Thai Grading System: Scale and pass mark
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The Thai grading system uses the national Annual subject-grade scale, which goes from 0 to 4. The percentage key is official, and grading rules are set nationally by the central authority.
This page explains how the scale works and what teachers may encounter when teaching students from Thailand. It also provides related grading systems and sources for verification.
The Thai grading scale: 0 to 4
The main school scale, called the Annual subject-grade scale, runs from 0 to 4, with 4 as the best grade and 0 as the worst. Its percentages are an official key. At Ban Huai Alai School only, grade 1 is the lowest passing grade; grade 0 does not pass.
| Grade | Native label | Meaning | Passing | Percent |
|---|---|---|---|---|
| 4 | ดีเยี่ยม | Excellent | Yes | 80 to 100% |
| 3.5 | ดีมาก | Very good | Yes | 75 to 79% |
| 3 | ดี | Good | Yes | 70 to 74% |
| 2.5 | ค่อนข้างดี | Fairly good | Yes | 65 to 69% |
| 2 | น่าพอใจ | Satisfactory | Yes | 60 to 64% |
| 1.5 | พอใช้ | Fair | Yes | 55 to 59% |
| 1 | ผ่านเกณฑ์การประเมินขั้นต่ำ | Meets the minimum assessment criteria | Yes | 50 to 54% |
| 0 | ไม่ผ่านเกณฑ์การประเมิน | Does not meet the assessment criteria | No | 0 to 49% |
Percent bands are set by the authority. The source gives these score ranges in the school's annual assessment regulations.
Grade 0 does not pass.
Compared with related systems
Thailand
7 of 8 grades pass
Afghanistan
4 of 5 grades pass
Bangladesh
6 of 7 grades pass
Albania
2 of 3 grades pass
How grading works in Thailand
Grading rules in Thailand are set nationally.
At the end of Grade 3, the central authority sets four-level criteria for reading, writing, calculation and application in daily life; schools set criteria for eight abilities, desirable characteristics and learner-development activities.
Schools summarize assessment results and report them to parents periodically, at least once per semester.
Students advance from Grade 1 to Grade 2 and from Grade 2 to Grade 3 when they meet school-set criteria for all eight end-of-primary abilities and desirable characteristics.
If they do not meet the criteria, the school may still advance them and use their results to plan learning activities or other support.
Teaching students from Thailand
Teaching students from Thailand
Ask students to provide their report cards and transcripts. Check the grading key on each document and record the grades using that key. Set the scale up once in a gradebook so every report card and transcript you produce uses the same key.
Related grading systems
- Afghanistan5-step points scale, 90-100 is best; passing grade 40-54 (D)
- Bangladesh7-step letter-grade scale, A+ is best; passing grade D (Sufficient)
- Albania3-step numeric scale, 10 is best; passing grade 5
- Argentina6-step numeric scale, 10 is best; passing grade 6 (Suficiente)
- Botswana10-step grading scale, A* is best; passing grade No pass mark
- Germany6-step numeric scale, 1 is best; passing grade 4 (Ausreichend)
Sources and verification
- [1]huayalai.loei1.go.th. โรงเรียนบ้านห้วยอาลัย - การวัดและประเมินผลการเรียน. Accessed Oct 21, 2026. Official source
- [2]nitedcr1.go.th. คู่มือ การ วัด และ ประเมิน ผล การ เรียน รู้. pdf. Accessed Oct 21, 2026. Official source
The facts on this page were last verified on Oct 21, 2026. Suggest a correction
Frequently asked questions
What is a passing grade in Thailand?
At Ban Huai Alai School, grade 1 is the lowest passing grade, corresponding to 50–54%. Grade 0, corresponding to 0–49%, does not pass.
How do Thai grades convert to US grades?
No Thai-to-US grade conversion is stated.
Do schools in Thailand use percentages for grades?
Yes. The annual subject-grade scale at Ban Huai Alai School has an official percentage key, ranging from 0–49% for grade 0 to 80–100% for grade 4.
Is a 2 a good grade in Thailand?
At Ban Huai Alai School, grade 2 is “น่าพอใจ” (Satisfactory) and corresponds to 60–64%.
