Families comparing schools usually want one table that turns a grade in one system into a grade in another. That table does not exist, and anyone who publishes one is guessing. What can be shown honestly is the four scales beside each other, and where the real anchor points are.
The four scales
| System | Scale | Where the line falls |
|---|---|---|
| IGCSE (letters) | A* A B C D E F G, then U | Requirements are written around C |
| IGCSE (numbers) | 9 down to 1, then U | Requirements are written around 4, sometimes 5 |
| UEC | A1 A2 B3 B4 B5 B6 C7 C8 F9 | Credit is B6 and above |
| SPM | A+ A A− B+ B C+ C D E G | Pass is E; credit is C |
The one conversion that is real
Cambridge anchors its two scales to each other at exactly three points: grade 7 equals grade A, grade 4 equals grade C, and grade 1 equals grade G. Those are the same standard reported two ways. Everything between them depends on where the boundaries fall in a given series, and grade 9 sits above the old A* rather than replacing it.
Why the others cannot be lined up
Different examinations, different syllabuses, different papers and different candidates. A B4 in UEC and a B in SPM and a B at IGCSE are three separate judgements made by three separate boards about three different pieces of work. Nothing has ever been benchmarked between them, so a conversion would be an opinion presented as a fact.
What each system does share is the shape of the thing: a top band, a credit band that most requirements are written in, a pass band below it that satisfies fewer requirements than people expect, and a fail. Reading a certificate from another system is easier if you look for those four zones rather than for a matching letter.
What universities actually do
They do not convert. Each institution publishes separate entry requirements for each qualification it accepts — so many subjects at such a grade for IGCSE, a points total or named subjects for UEC, named subjects at credit for SPM. A UEC applicant is read against the UEC requirement, not against a translated IGCSE one.
Which is the practical answer to the whole question: do not convert a grade. Find the requirement written for the qualification the student actually holds, and read that.
比较学校的家长，通常想要一张能把甲制度的等级换成乙制度等级的对照表。这张表并不存在；凡是公布这类表格的，都是在猜。能够诚实呈现的，是四套等级并排放着，以及真正的对齐点在哪里。
四套等级
| 制度 | 等级 | 分界线在哪 |
|---|---|---|
| IGCSE（字母） | A* A B C D E F G，其下为 U | 入学条件多以 C 来写 |
| IGCSE（数字） | 9 至 1，其下为 U | 入学条件多以 4 来写，有时是 5 |
| 统考 UEC | A1 A2 B3 B4 B5 B6 C7 C8 F9 | 良等为 B6 以上 |
| SPM | A+ A A− B+ B C+ C D E G | E 为及格，C 为优等 |
唯一真实存在的换算
剑桥把自己的两套等级只在三个点上互相对齐：7 等等于 A、4 等等于 C、1 等等于 G。那是同一个标准的两种呈报方式。三点之间的部分取决于该考期的分界线，而 9 等高于原本的 A*，并不是取代它。
其余为什么无法对照
不同的考试、不同的考纲、不同的试卷、不同的考生。统考的 B4、SPM 的 B、IGCSE 的 B，是三个考试局对三份不同作业所作的三个独立判断。它们之间从未做过标准对接，因此任何换算都是把意见当成事实来讲。
各制度真正共通的，是结构：最高一档、大多数入学条件所用的优等档、其下一个“及格但能满足的要求较少”的档，以及不及格。读另一套制度的成绩单时，找这四个区块，比找对应的字母容易得多。
大学实际怎么做
它们不做换算。每一所院校会针对自己接受的每一种资格，分别公布入学条件——IGCSE 是几科达到什么等级，统考是分数合计或指定科目，SPM 是指定科目达到优等。统考申请者是按统考的要求来读，而不是按换算过的 IGCSE 要求。
这也就是整个问题的实际答案：别去换算等级。去找为学生真正持有的那份资格所写的要求，读它。
More in this section本部分其他文章
Questions across all systems跨考试制度的共同问题
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