University GPA calculator
Calculate your semester GPA and updated CGPA using Thammasat University's own grading scale, credit weighting, rounding rules, and CGPA formula — not a generic Thailand average.
Formula type
4.00 GPA scale
8 grades carry points, 5 do not, and results are rounded to 2 decimal places. Verified 2026-07-21.
GPAWorld
Semester GPA
4.00
Updated CGPA
--
GPA Credits
9
Rows
3
Thammasat University
Thailand · 4.00 GPA scale
Enter your current CGPA and completed credits to calculate your updated CGPA. Your semester GPA is shown from your courses below.
9 credits entered
Every grade Thammasat University awards, the points it carries, and whether it counts toward the GPA or earns credit. This is the table the calculator above runs on.
| Grade | Meaning | Points | GPA counted | Credit earned |
|---|---|---|---|---|
| A | Excellent | 4.0 | Yes | Yes |
| B+ | Very Good | 3.5 | Yes | Yes |
| B | Good | 3.0 | Yes | Yes |
| C+ | Almost Good | 2.5 | Yes | Yes |
| C | Fair | 2.0 | Yes | Yes |
| D+ | Almost Fair | 1.5 | Yes | Yes |
| D | Poor | 1.0 | Yes | Yes |
| F | Failed | 0.0 | Yes | No |
| S | Satisfactory | Excluded | No | Yes |
| U | Unsatisfactory | Excluded | No | No |
| W | Withdrawal | Excluded | No | No |
| I | Incomplete | Excluded | No | No |
| EXE | Exempted / No Credit Awarded | Excluded | No | No |
Thammasat University converts every graded course into quality points by multiplying the grade's point value by the course's credit hours. Your semester GPA is the total quality points divided by the total credit hours that count toward the GPA, and the result is rounded to the nearest 2 decimal places. Points run from 0.0 up to 4.0, so a higher average is a better result. The scale uses plus and minus grades, so there are 8 distinct point values rather than a handful of whole steps: A is worth 4.0 and B+ is worth 3.5.
S, U, W, I, and EXE carry no point value at Thammasat University, so a course marked with one of them drops out of the division entirely — it changes neither the top nor the bottom of the fraction. S still earns credit toward your degree while staying out of the GPA, which is why your credit total can climb in a semester where your GPA barely moves. F works the other way: it earns no credit but is still counted in the average at 0.0 points, so a failed course pulls the average down while adding nothing to your progress.
Thammasat states grade values are used to calculate GPAs weighted by each course credit; official undergraduate regulations state cumulative GPA is the total grade-value times credits divided by total registered credits. In practice that means your existing CGPA is turned back into quality points by multiplying it by your completed credits, this semester's quality points are added on, and the total is divided by your new credit total. Both the semester and the cumulative figures are rounded to the nearest 2 decimal places. Every attempt at a repeated course stays in the cumulative average — the earlier grade is not removed.
All 2 Thailand universities covered here — including Assumption University — publish the same 4.00 GPA scale. Repeated courses are handled differently again at Assumption University.
A GPA only means something alongside the scale it was calculated on, which is why comparing raw numbers between institutions — even neighbouring ones — is unreliable. See the Thailand comparison table for every university covered there side by side.
Each example below is run through the same engine the calculator uses, so the numbers show Thammasat University's own rounding.
A student sitting at 2.88 after 60 completed credits takes 3 courses worth 3 credits each.
Semester GPA 3.00 · Updated CGPA 2.90
The semester total is 27 quality points over 9 counted credits. Because the cumulative average now spans 69 credits, one semester moves it only a little — this is why a CGPA gets harder to shift the further into a degree you are.
The same student adds a fourth 3-credit course graded S (Satisfactory).
Semester GPA 3.00 · Updated CGPA 2.90
The semester GPA is unchanged at 3.00. S carries no grade points at Thammasat University, so the course is removed from both sides of the division — even though the credit still counts toward the degree. Students often expect a fourth course to move the average and are surprised when it does not.
The same semester again, but the last course comes back as F (Failed) instead.
Semester GPA 2.33 · Updated CGPA 2.81
The semester GPA slips from 3.00 to 2.33, and the cumulative average slips from 2.90 to 2.81. F is worth 0.0 points and earns no credit, so it weighs the average down while adding nothing to your degree progress.
A student with a 2.88 CGPA after 60 credits takes 4 courses worth 3 credits each (12 credits in total). Here is where that CGPA lands if every course comes back at the same grade — calculated with the Thammasat University scale and rounding.
| If every course is | Semester GPA | New CGPA | Movement |
|---|---|---|---|
| A (4.0) | 4.00 | 3.07 | +0.19 (better) |
| B+ (3.5) | 3.50 | 2.98 | +0.10 (better) |
| B (3.0) | 3.00 | 2.90 | +0.02 (better) |
| C+ (2.5) | 2.50 | 2.82 | −0.06 (worse) |
| C (2.0) | 2.00 | 2.73 | −0.15 (worse) |
Your own starting CGPA and completed credits will differ — enter them in the calculator above for your real figure.
These are the places where the Thammasat University rules differ from what most students assume, and where a hand calculation usually goes wrong.
Counting S courses in the average
These earn credit at Thammasat University but carry no grade points, so they belong in your credit total and nowhere near the GPA division. Including them is one of the most common reasons a hand-calculated GPA comes out wrong.
Dropping a failed course from the calculation
F earns no credit toward the degree, but it is still counted in the GPA at 0.0 points. Leaving a failure out flatters the result.
Guessing the plus/minus values
At Thammasat University, A is worth 4.0 and B+ is worth 3.5. Those steps differ between universities, so a value copied from another school's chart will quietly skew the whole average.
Averaging the grades instead of weighting them
A course worth twice the credits moves your GPA twice as much. Adding up your grade points and dividing by the number of courses ignores that weighting and is almost always wrong.
Expecting a 0-credit course to move the number
Thammasat University allows them, but with no credit hours they contribute nothing to either side of the division.
D (1.0 points) is the weakest grade in the Thammasat University table that still earns credit. Anything below it — F — is counted in your GPA but earns no credit toward the degree. Individual programmes can set a higher minimum for courses in your major, so check your programme handbook as well.
4.0 on the 4.00 GPA scale, which you reach by earning A (4.0 points) in every course that counts toward the GPA.
The cumulative average is rounded to the nearest 2 decimal places, and the semester average is rounded to the nearest 2 decimal places. That is ordinary rounding, so a result sitting exactly half a step along goes up.
No. This page is generated from the grading configuration for Thammasat University alone — its 8 point values, its standard rounding, and its own rules for pass/fail and repeated courses. Other universities in Thailand routinely use different point values or a different scale entirely, so the same grades can produce a different GPA elsewhere.
No. S earns credit at Thammasat University without carrying grade points, so it is excluded from the GPA division entirely. Your completed-credit total goes up while the average stays where it was.
S (Satisfactory), U (Unsatisfactory), W (Withdrawal), I (Incomplete), and EXE (Exempted / No Credit Awarded) carry no grade points and are left out of the average. Of those, S still earn credit toward the degree.
Every attempt at a repeated course stays in the cumulative average — the earlier grade is not removed.
Your CGPA is weighted by every credit you have already completed, so a single semester moves it less the further along you are. Fifteen credits added to sixty already completed is a fifth of your record; the same fifteen added to a hundred and twenty is an eighth of it. Use the calculator at the top of this page with your real completed-credit total rather than estimating the movement.
No. GPAWorld is an independent tool and is not affiliated with or endorsed by Thammasat University. The grading data on this page was taken from Thammasat University Regulations on Undergraduate Education B.E. 2561 (2018) and Bachelor of Economics International Program, Thammasat University - Assessments & Academic Status and last verified on 2026-07-21; every source is linked on this page so you can check it yourself. Your registrar's record is always the authority.
Judgement calls and caveats recorded when this grading configuration was built from the official sources. They are published so you can see exactly what the calculator assumes.
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