PG2 SEC Subject Grades & Mapping | G1/G2/G3 2027

What is PG2 SEC Subject Grades and Mapping? Did you know that Posting Group 2 (PG2) does not have a single examination grade? From 2027, Singapore’s Secondary Education Certificate (SEC) records each subject at its own G1, G2 or G3 level. The grading scales are different, and MOE/SEAB apply specific mapping rules only when an eligible post-secondary aggregate needs a score expressed on another subject-level scale.

The most important distinction: Grade mapping is a calculation for a specified admission route, not a promotion of a subject. A student who earns G2 Mathematics grade 1 has achieved a strong result in G2 Mathematics. It does not become G3 Mathematics A1 on their SEC, nor does it automatically meet a G3 Mathematics prerequisite.

Parents planning JC, polytechnic, PFP or ITE routes should first record the subject name, actual G-level and actual grade, then see whether that route permits grade mapping. The first SEC cohort sits examinations in 2027 and receives results in January 2028, alongside a new Post-Secondary Admissions Exercise (PSE).

The rules that matter at a glance

Subject level	SEC grades
G1	A, B, C, D, E
G2	1, 2, 3, 4, 5, 6
G3	A1, A2, B3, B4, C5, C6, D7, E8, 9
SEAB grade mapping direction	Higher-demanding level to less-demanding level where an aggregate needs it
Does mapping rewrite the certificate?	No. The subject and level remain as examined
Where mapping can matter	PFP ELMAB3, ITE aggregates and one best-subject slot in direct polytechnic ELR2B2

One certificate can show different levels and different grade scales

Under Full Subject-Based Banding, G1, G2 and G3 correspond broadly to the previous N(T), N(A) and Express standards. Their grading structures remain familiar: G1 uses letters A to E, G2 uses numbers 1 to 6, and G3 uses the familiar nine O-Level-style grades from A1 to 9.

The certificate is designed to report the subjects the student actually examined and the level of each. Two friends in the same form class might earn grades that look completely different in notation because they took different subject levels. It would be misleading to sort them into a single ranking without accounting for the examinations involved.

Consider one fictional learner taking G3 English, G3 Mathematics, G2 Science and G2 Combined Humanities. A marksheet for this student might display B4, A2, 2 and 3 respectively. The numbers do not all belong to one linear grade scale. Their meaning depends on the subject level recorded next to each.

This is why parents should store the exact level with every result in a planning spreadsheet. ‘Mathematics: 2’ is incomplete. ‘G2 Mathematics: grade 2’ tells us what was actually sat, even if later an aggregate uses that result differently.

The strongest plan does not treat lower-demanding subject levels as useless or more-demanding levels as prizes. The question is which level the learner can study effectively and which results a particular pathway requires.

The official G3-to-G2 mapping, correctly read

When an admission pathway such as PFP needs an aggregate expressed on the G2 scale, SEAB maps relevant G3 results down to the G2 scale. A G3 A1, A2 or B3 maps to a G2 grade 1; B4, C5 or C6 maps to a G2 grade 2; D7 maps to 3; E8 maps to 4; and grade 9 maps to 5.

Notice what this table does not say. It does not say that a G2 grade 1 can be treated as G3 A1, nor that G2 grade 2 satisfies all G3 relevant-subject minima. The relationship is prescribed for a calculation direction and purpose.

For example, a learner with G3 Mathematics B4 may have that subject counted as grade 2 for a G2-scale ELMAB3 aggregate. On the SEC itself, the result remains G3 Mathematics B4. The mapping does not imply the student actually sat the G2 paper.

A parent planning direct polytechnic entry should check whether a G3 ‘best’ subject needs to be mapped to the permitted G2 last-best slot. Another parent looking at PFP may find G3 subjects mapped down when building the G2 ELMAB3 aggregate. These are separate application calculations even if both refer to the same mapping table.

Always record actual grades first, then create a separate mapped column explicitly labelled with the destination and rule. Mixing them in one column is a common source of misleading calculations.

The G2-to-G1 mapping has a different scale

SEAB also publishes a G2-to-G1 mapping. G2 grades 1, 2 and 3 map to G1 grade A; G2 grade 4 maps to B; G2 grade 5 maps to C; and G2 grade 6 maps to D. This is used when an eligible progression calculation is expressed on the G1 scale.

Again, the operation does not change the original certificate. A G2 grade 4 remains a G2 grade 4, even if some authorised route needs a mapped G1 B for its aggregate.

If a G3 result needs to be mapped all the way to G1, SEAB states that it is mapped to G2 first, then from G2 to G1. Families should not invent a direct unofficial conversion table or reverse the published mapping.

A mathematical point helps: converting a more detailed scale to a smaller set of categories loses information. The single mapped value cannot tell you which original grade within a mapped group was earned. That is a reason not to treat the mapping as equivalence for admission prerequisites.

Students with both G2 and G3 results therefore need to maintain careful records so that school counsellors or admissions officers can see the exact qualification rather than only the mapped score.

Worked example: calculating a G2-scale ELMAB3 illustration

SEAB gives an official illustration of how an ELMAB3 aggregate may be calculated with a mixed G3 and G2 subject profile. For example, consider G3 English B4, G3 Mathematics A1, G3 Science B3, G2 Combined Humanities 2 and G2 Chinese 5.

Using the official mapping direction, English B4 becomes a G2-scale 2, Mathematics A1 becomes 1, and Science B3 becomes 1. The G2 results remain 2 and 5. A simple sum would therefore be 2 + 1 + 1 + 2 + 5 = 11 for this illustrative five-subject set.

Did you know? An aggregate of 11 alone is not a guarantee of PFP admission. Applicants must meet the applicable minimum grade requirements for English, Mathematics, relevant and best subjects, and available programme conditions. An aggregate can look acceptable while a particular subject misses its minimum.

The same calculation would be incorrect if someone first changed the G2 Chinese 5 into an invented G3 grade and then added it. The G2 result is already on the scale required for the ELMAB3 example.

This is why parents should separate three checks: is the subject eligible in the particular component, does the grade meet the relevant minimum, and does the aggregate fall within the qualifying threshold? Passing only the third check is not enough.

Polytechnic ELR2B2: why one G2 best-subject slot matters

MOE’s revised direct Polytechnic Year 1 rules from 2028 allow one eligible G2 subject to count as the final best subject of the five-subject ELR2B2 calculation. The other four subjects—English Language, two relevant subjects and one other best subject—continue to be required at G3.

The general net aggregate cut-off is adjusted to 22, but every diploma still has its own minimum entry requirements. The grade-mapping rule applies if a G3 subject occupies the slot that is scored on the G2 scale; it does not allow an arbitrary G2 subject to fulfil a required G3 relevant-subject slot.

Consider a fictional candidate who has both best subjects at G3. Under the announced rule, the lower-performing of those G3 best-subject grades may be mapped down to the G2 scale for the last-B score. This preserves a way to calculate the revised aggregate, even though the student did not take a G2 subject in that position.

An important mistake is assuming that a G2 subject counted once creates permission to count more G2 subjects elsewhere. The specified English, relevant and other best-subject conditions remain. Parents need the intended diploma’s eligible subject list, not just a screenshot of the aggregate formula.

Eligibility should be considered before cut-off competition. A valid calculated score does not guarantee selection when places are limited or course prerequisites are unmet.

JC L1R4: where grade mapping should not be invented

JC admission from 2028 follows a revised L1R4 formula with a general gross threshold of 16. It requires subjects in prescribed groups: L1 English or Higher Mother Tongue Language, R1 Humanities, R2 Mathematics/Science, R3 Humanities/Mathematics/Science and R4 a best eligible subject. The qualifying G3 subject and grade rules must still be met.

A common misunderstanding is to use an excellent G2 Science or Humanities grade to fill a missing required G3 R1 or R2 subject. The polytechnic G2 best-subject concession is not a general JC G2-to-G3 equivalence.

Mother Tongue admission conditions can be fulfilled by appropriate results at specified levels under the published rules, but this separate qualifying condition should not be confused with the L1R4 grade computation.

Likewise, the general JC aggregate requirement and a desired JC H2 subject’s prerequisites are different matters. A student who meets the former may still need appropriate earlier study to offer H2 Mathematics or Science at their chosen JC.

The goal of grade mapping is to recognise achievement appropriately for particular progression routes. It is not designed to make every syllabus level interchangeable.

The SEC certificate itself: what counts as an award?

SEAB states that an SEC will be awarded when a candidate meets the relevant minimum passing threshold in at least one subject: G3 grade E8 or better, G2 grade 5 or better, or G1 grade D or better. That certificate-award rule should not be confused with the much stricter or more specific requirements of a particular post-secondary programme.

Being awarded the SEC therefore does not mean the candidate automatically qualifies for JC or a polytechnic diploma. Those destinations depend on a full set of subjects, required levels, grades, aggregates and programme-specific conditions.

The certificate helps make actual achievement visible across different subject levels. A learner could have secure competence in G2 Mathematics while working toward a later technical qualification through an appropriate pathway. The certificate does not itself explain all the later routes; that requires reading admissions rules.

Parents can help by keeping the distinction clear: certificate award, qualification for application and competitive course selection are three different decisions.

Six practical mistakes to avoid when comparing grades

Mistake one: writing ‘2’ without the G-level. A grade needs its examination context. Mistake two: converting G2 grade 1 upward to G3 A1. SEAB’s stated mapping is not reversible in that way.

Mistake three: confusing a permissible aggregate mapping with a subject-entry prerequisite. A relevant course may still require a specific G3 subject. Mistake four: summing grades before checking whether the subjects belong in the permitted EL, Mathematics, relevant or best categories.

Mistake five: assuming a qualifying aggregate guarantees admission. Courses can have minimum subject requirements and limited places. Mistake six: relying on old N-Level or O-Level page labels without checking the actual SEC 2027/2028 admissions framework.

A simple spreadsheet can contain separate columns for actual subject, actual G-level, actual grade, intended route, whether mapping is permitted, mapped score if applicable, and minimum entry requirement. This is safer than trying to remember conversions mentally.

When uncertainty remains, ask a teacher, school ECG counsellor or admissions provider for clarification with the actual subject list. Do not make irreversible choices based on an unofficial conversion guess.

A family action plan before the 2028 applications

First, locate the child’s actual and intended subjects and levels. Then confirm which examinations are the relevant 2027 SEC syllabuses. This is especially important when names such as ‘Maths’, ‘Science’ or ‘Humanities’ refer to several possible G2 or G3 subjects.

Second, examine one realistic route at a time. For JC, use the prescribed L1R4 subject groups. For direct polytechnic entry, use the intended diploma’s ELR2B2 category and minimum subject requirements. For PFP, use the applicable ELMAB3 criteria and actual cluster or programme conditions.

Third, apply any authorised grade mapping in the correct direction. Show both original and mapped result, and label the admission purpose for which the mapping is used. Never overwrite the official grade.

Fourth, ask what alternative routes are available if a particular requirement is not met. PFP, ITE and later diploma progression may be suitable for eligible students. University entry is a separate later decision based on further qualifications and degree prerequisites.

The most useful result is clarity: the family knows which grades have genuinely been achieved, which aggregate is permitted, and which next educational step is realistic.

Choose a real next stage, not just an aggregate

Next option	First verification
JC / MI	Prescribed G3 academic subject combination, grade conditions and the correct L1R4 threshold
Polytechnic Year 1	Four G3 counted components, eligible last best at G2, diploma minimums, available places
PFP	ELMAB3 calculated on the appropriate G2 scale and minimum subject conditions
ITE / Higher Nitec	Programme and entry route eligibility, with later progression possibilities
University	A later recognised qualification and specific degree prerequisites

Frequently asked questions

Is PG2 a grade?

No. PG2 is a secondary-school posting group, not a SEC grade or subject level.

Does a G2 grade 1 become G3 A1?

No. The published mappings convert higher-level grades downward for approved calculations, not G2 grades into equivalent G3 qualifications.

How is G3 B4 mapped for a G2-scale aggregate?

The official G3-to-G2 table maps B4, C5 and C6 to G2 grade 2.

Does a G2 grade 6 map to G1 D?

Yes, where G2-to-G1 mapping is required for the applicable progression calculation.

Does receiving an SEC certificate guarantee a JC place?

No. The SEC award threshold is different from post-secondary aggregate and subject requirements.

Where can I check the mapping before applying?

Use SEAB’s official SEC grading page and current admissions documents for the destination and intake year.

Parent’s next actions

Confirm the actual SEC subject codes, levels and grades instead of using the PG2 label as an aggregate.
Choose one real JC/MI, diploma, PFP or ITE programme and read its current relevant-subject minimum requirements.
Use official mapping only for the specific aggregate for which it is authorised; do not rewrite the student’s qualification.
Discuss realistic strengths and next-stage options with the school rather than promise a particular course outcome.

Explore related PG2 education pathway guides

Official sources

Information checked against MOE and SEAB announcements available in October 2026. This page explains official grade mappings and announced admission rules for planning; it is not an examination result, placement decision or promise of eligibility. Check the exact official requirements in the student’s application year.

What is PG2 SEC Subject Grades and Mapping | Education Pathway for JC/Poly/Uni