Is an IGCSE grade 9 the same as A*, and can an IGCSE grade C be converted directly into Singapore SEC G2 or G3? Not by a simple universal formula. Cambridge IGCSE has an A*–G grading system, and certain corresponding syllabuses offer a 9–1 grading option in the applicable administrative zone. Singapore’s Full Subject-Based Banding (Full SBB), meanwhile, uses G1, G2 and G3 to identify subject levels, not a 1-to-3 scale of examination grades. The new Singapore-Cambridge Secondary Education Certificate (SEC), beginning in 2027, records both the subjects and levels actually taken. G3 is not a mark of 3; it is the level of the subject.
For parents reading a result slip, these distinctions are not academic trivia. The wrong comparison can lead to an unsuitable subject entry, incorrect school applications or unnecessary pressure on the child. This guide explains how to read an IGCSE report, where A*–G and 9–1 align, why grade boundaries move, what percentage uniform marks mean and how to discuss a child’s results in relation to a Singapore G-level profile without inventing equivalences.
The short answer in 45 seconds
- Cambridge IGCSE A*–G: A* is the highest grade, then A, B, C, D, E, F and G; an ungraded result is below G.
- Cambridge IGCSE 9–1: an alternative grading route for specified syllabuses available under Cambridge’s grading-choice arrangements; 9 is highest and 1 is lowest on that scale. The relevant syllabus code and administrative availability matter.
- Grade anchors: Cambridge explains that grade thresholds 7, 4 and 1 are set to the standards of A, C and G respectively. Do not assume that every other grade has a simple one-letter translation.
- Percentage Uniform Mark (PUM): if shown, it describes where performance sits within a grade. It is not the raw percentage of questions answered correctly.
- Full SBB G1, G2, G3: the subject’s Singapore curriculum and examination levels. They are not equivalent to Cambridge IGCSE grades 1, 2 or 3.
- SEC 2027: the national examination that records each subject and the level taken. Admissions decisions use institution-specific requirements, not a homemade IGCSE conversion chart.
One decision rule prevents most confusion: write the qualification, examining body, syllabus code, examination year, paper option and grade before attempting any comparison. A child who says “I got a 7” may be talking about a 9–1 IGCSE grade, an internal score or another qualification entirely. Do not compare numbers until the labels have been identified.
Three different questions are hiding behind “What grade did my child get?”
First, what was the level of the course? Under Singapore Full SBB, the answer may be G1, G2 or G3 for a particular subject. That is a statement about curriculum and assessment standard, not the final grade achieved.
Second, which examination was taken? A Cambridge IGCSE subject has an international syllabus code; a Pearson Edexcel International GCSE has a different specification; a Singapore SEC subject in 2027 has a K-code in the published SEAB list. An older Singapore-Cambridge O-Level code or an international Cambridge syllabus code does not become interchangeable because both names mention Cambridge.
Third, how well did the candidate perform within that examination? That is where A*–G, 9–1 or the Singapore examination’s own grading enters the conversation. These are three distinct pieces of information: level, qualification and result. Write them on separate lines when comparing options.
What A*–G Cambridge IGCSE grades mean
Cambridge IGCSE’s traditional eight-point scale is A*, A, B, C, D, E, F and G. Some schools and institutions set minimum requirements such as a particular grade in Mathematics or English. Others use different criteria. The existence of grade G on the certificate does not mean that every institution treats G as meeting its admissions threshold. Cambridge grades reflect a standard reached; an admission requirement is a separate rule.
The letter grade also should not be presented as a fixed raw percentage. The marks needed for a grade may vary by subject, examination series and paper difficulty. Cambridge publishes grade thresholds after an examination series to apply consistent standards. A student may earn a different raw mark from a student in a different series while both receive the same grade.
Consider an invented example. In one paper series, a particular grade boundary might fall at raw mark 68; in another, at 72. The numbers here are illustrative, not official IGCSE thresholds. If a parent believes “A is always 80% of the raw marks,” the parent is using an incorrect rule. The correct information is in the relevant subject’s awarding-body threshold and mark scheme for the actual series.
Start with Cambridge’s results information and how statements of results work. Do not use a teacher’s grade estimate or a practice-paper percentage as though it were the final awarded examination grade.
How Cambridge IGCSE 9–1 grading works
Cambridge offers selected 9–1 graded IGCSE syllabuses in an eligible administrative zone, using distinct syllabus codes. It is not correct to assume that every Cambridge IGCSE school in Singapore, or every syllabus, offers both grading scales. The entering centre must check the qualifications and options available to it for the relevant examination series.
The important anchor points are specific: Cambridge says the standards at 7, 4 and 1 are equivalent to those at A, C and G respectively. It determines other boundaries by its established grading process. A grade 9 is the highest number grade. It is not safe to write a complete conversion table mapping every number to a letter and then apply it to unrelated Pearson, Singapore or other examination systems.
There is an administrative consequence, too. Cambridge explains that after the entries deadline has passed, a centre cannot simply change a candidate from the A*–G version to the 9–1 version. Entry codes and deadlines matter. A parent who discovers a different-looking grading scale should confirm whether it is truly an alternative award being entered or merely a result-display difference.
Primary source: Cambridge IGCSE grading choice and Cambridge: how 9–1 grading works.
What is a Percentage Uniform Mark, and why is it not a raw mark?
A Percentage Uniform Mark, sometimes shown on Cambridge statements of results in countries where it is provided, puts a student’s performance on a scale describing position within the awarded grade. Cambridge explicitly says it is not the total mark achieved. For example, a PUM of 90 represents the minimum position for an A* on Cambridge’s uniform scale; it does not mean the candidate necessarily answered 90% of the exam marks correctly. Grade thresholds are taken into account when the uniform figure is assigned.
Imagine two students both see a number near 80. One holds a school practice-paper score out of 100, while the other holds a Cambridge PUM. They are not reading the same measurement. The first describes points awarded on a particular test; the second describes position on a standardised reporting scale associated with a grade. Combining them in a spreadsheet and ranking the children by the number alone would be misleading.
Cambridge’s official guide to percentage uniform marks is the reference to use when the figure appears on a result slip. Ask the school to explain precisely which number is shown before making study or admission decisions.
How Singapore SEC G1, G2 and G3 results differ
Singapore implemented Full SBB for the Secondary 1 cohort from 2024. Students may study different subjects at G1, G2 or G3 according to the relevant arrangements. From the 2027 graduating cohort, the SEC replaces separate N(T), N(A) and O-Level certificates. SEAB states that students receive a certificate reflecting the subjects and their subject levels. The overall examination standards do not change solely because the certificate name changes.
A student might offer G3 Mathematics but G2 English, with other subjects at various levels. Such a profile is not a contradiction. It is a practical expression of Full SBB’s aim of matching subject learning more closely to a student’s strengths and needs. The letter or number of a grade achieved in one subject still needs to be read alongside its subject level. A high grade at one level does not mean the child automatically sat the examination at a different level.
For 2027, SEAB publishes separate G1, G2 and G3 syllabus lists. Check the exact code for each subject. For example, G3 English Language is K300 and G2 English Language is K200 in the 2027 lists. A parent comparing English papers should not silently substitute Cambridge IGCSE First Language English 0500 for either of these SEC syllabuses.
Read IGCSE vs O-Level and SEC in Singapore and Posting Group versus Subject Level for the distinction between entry pathways and subject standards.
Worked family example: two students appear to have the same result
Suppose a family receives two school reports from different systems. Learner A has an A in Cambridge IGCSE Mathematics 0580. Learner B has a high school-based percentage in SEC G3 Mathematics preparation. Neither record is a complete statement about relative ability. The student taking the final IGCSE is being measured against an international syllabus and its awarded boundaries; the other result may come from an internal school assessment of national subject requirements. Without looking at what the assessments tested, comparing A and a percentage gives false precision.
The correct conversation is more useful: “Can each student interpret a multistep algebra problem, represent it accurately, explain their working and check the result?” If one student solves routine equations yet fails to recognise a hidden proportional relationship, this reveals a learning gap that the label alone cannot show.
Try this simple diagnostic. A shop marks up a product by 25%, then discounts the marked-up price by 20%. Does it return to the original price? Let the original price be $100. After the mark-up it becomes $125. After the discount it becomes $100. The two percentages happen to cancel here because they use different bases with reciprocal factors 1.25 and 0.8. The child who says “25 minus 20 equals a 5% gain” is not tracking the base quantity. That reasoning problem matters in both qualification routes.
Change the example: mark up by 20%, then reduce by 20%. Starting from $100, the price moves to $120 and then $96, a 4% loss. A learner who can explain both results demonstrates transfer; a learner who memorises one percentage shortcut has a fragile foundation. Such evidence is more valuable for teaching than speculative comparisons between certificate labels.
Why grade thresholds are not a prediction machine
Past thresholds can help parents understand how a particular series was awarded. They are not a guarantee of what raw mark will receive a particular grade next year. Examination difficulty, candidate performance and the awarding body’s standard-setting process all matter. Past papers are useful for practising command words, time management and topic retrieval, not for promising an exact letter based on last year’s cut-off.
In school, separate a practice test’s raw score, a teacher’s estimated grade, a mock examination’s predicted grade, and the final awarding body’s certified result. Each serves a different purpose. If a child scores 70% in a mock paper, the constructive response is to identify which errors are stable misconceptions and which are exam-technique errors; do not declare an official Cambridge grade from that number alone.
How colleges and schools actually use results
A receiving school or institution may specify minimum grades in named subjects and language qualifications. It may also assess applicants holistically, require entrance assessments, place limits on subject combinations or take account of vacancies. Therefore “recognised internationally” and “accepted for this course in Singapore” are different claims.
For example, Singapore Polytechnic expressly describes an application route through its Direct Admissions Exercise for applicants with qualifications including IGCSE, but admission depends on the polytechnic’s rules and vacancies. Families aiming at an IB Diploma or sixth form should contact the specific school about qualification, subject and grade requirements. There is no nationwide table allowing families to turn an IGCSE grade into a Singapore SEC aggregate and assume entry.
For a complete discussion, see eduKate’s IGCSE to JC, Polytechnic or IB pathways. The most reliable next step is to read the actual current entry criteria for the intended course, not to choose a route based on a rumoured grade conversion.
Seven things to check before sending a result to an admissions office
- Qualification name: Cambridge IGCSE, Pearson Edexcel International GCSE, Singapore SEC or another certificate.
- Subject name and code: Mathematics is not specific enough. Include the code and version where relevant.
- Examination series: the year and series matter for syllabus and grade thresholds.
- Entry option: identify 9–1 or A*–G and Core/Extended only where the syllabus provides these options.
- Evidence type: official certificate, statement of results, school report, predicted grade or mock examination.
- Recipient’s rule: exact programme requirements, English-language conditions, application channel and deadline.
- Remaining uncertainty: ask the admissions office in writing how it will interpret this particular qualification, rather than translating it yourself.
How to respond constructively when the grade disappoints
First protect the distinction between a result and an identity. A result is evidence about performance in one assessment under one set of conditions. It is not a complete judgment on intelligence, work ethic or the child’s future. Analyse the question paper by type of mistake: misunderstood command word, missing prerequisite, incorrect model, arithmetic error, poor time allocation or a response that did not address the actual question.
Then choose one repair target. A student who can explain a concept verbally but cannot write it clearly may benefit from response-structure practice. Another who writes beautifully but misunderstands the underlying relationship needs direct concept teaching. A third who performs well immediately after revision but forgets after a week needs spaced retrieval and mixed practice. These interventions are not interchangeable.
Do not buy another full syllabus course merely because the grade label looks lower than a neighbour’s. First establish the student’s actual learning position and the demands of the next intended course. The goal is not to manufacture a different-looking certificate; it is to improve what the student can reliably do.
Frequently asked questions
Does a Cambridge IGCSE grade 9 mean 90%?
No. Grade 9 is a grade on a 9–1 scale; it is not a claim that 90% of raw marks were awarded.
Does Cambridge IGCSE A* always require 90 raw marks out of 100?
No. Where a PUM is issued, 90 is an anchor on the uniform reporting scale. Raw grade thresholds depend on the syllabus and examination series.
Is grade 7 identical to A in every examination system?
Cambridge explains the grade-7 and grade-A standard anchor for its corresponding IGCSE grading choices. It is not a general cross-system conversion rule.
Are all Cambridge IGCSEs available with 9–1 grades?
No. Availability depends on the subject, syllabus code and administrative zone. Ask the entering school or centre to confirm its options.
Is G3 the third-best grade under Full SBB?
No. G3 is a subject level in Singapore’s national secondary curriculum; it is not a rank or a grade of 3.
Can I use my IGCSE result to calculate an SEC score?
Do not invent a direct calculation. The receiving institution sets its own method of recognising international qualifications, if applicable.
What should parents do with a disappointing mock result?
Identify the earliest learning error and retest it in a fresh context. A mock score can help guide teaching; it is not the final awarding-body result.
Read the right next guide
For families comparing systems, open IGCSE versus SEC. For decisions about Cambridge Mathematics examination tiers, use IGCSE Core vs Extended and G1/G2/G3 Mathematics. For subject-specific preparation, consult How IGCSE Mathematics Works and Parents and Pathways. Each route answers a different question; do not ask one certificate to explain the entire child.
Official sources: Cambridge 9–1 grading; grading choice; statements of results; percentage uniform marks; SEAB SEC overview; SEAB syllabuses. Read the current version for the child’s examination year.
Independent parent guide; reviewed November 2026. Neither the appearance of a grading scale nor a rough comparison can replace official admission requirements.