IB A-Level AP 藤校G5 分数对比与选课
美国藤校和英国 G5 的招生页面像两个世界：一个讲 holistic review，一个讲 conditional offer。落到分数上，IB、A-Level、AP 三套成绩单还是会被放进同一张评估表里，看课程难度，看单科匹配，也看你在学校能开出的科目里选了什么。下面按 2027 入学（2026 年申请季）各校官网公开的口径，把分数门槛、单科要求和选课组合拆开说，数字都是区间，不是录取线。
American and British admissions pages read like two different worlds, one talking about holistic review and the other about conditional offers. Once scores are on the table, however, IB, A-Level and AP transcripts land in the same evaluation: course rigour, subject fit, and what a student chose from the options the school could actually offer. The figures below follow what each university published for 2027 entry, and they should be read as ranges rather than cut-offs.
三套分数体系各自的刻度
IB 是 45 分制，六门学科各 7 分，TOK 与 EE 合计 3 分，标准配置是三门 HL 加三门 SL，HL 拿到 6 分以上才算有竞争力。A-Level 是科目等级制，A* 最高，多数学生考三门，offer 也按三门写，第四门在大部分专业不加分。AP 是单科 5 分制，不和毕业文凭绑定，考几门、考哪些科目由学生自己排，学校只提供课程，不提供统一的文凭分数。大学读这三套成绩时不做简单换算，它们看的是你选的是不是所在学校能开出的最难组合：IB 的 HL 是否集中在相关学科，A-Level 有没有进阶数学，AP 里有没有 Calculus BC 和物理 C。同一个学生在不同体系里可能拿到不同结论，差别往往不在总分，而在科目结构。这套结构决定的不只是分数高低，还包括你能申请哪些专业。
The IB diploma tops out at 45 points, with six subjects graded out of seven and three more points from TOK and the extended essay. A-Level reports subject grades from A* down, and most offers are built on three subjects. AP is a per-subject exam scored out of five and is not tied to a diploma, so the number and mix of exams is a student's own decision. Admissions tutors rarely convert between the three systems; they ask whether the combination is the hardest one the school could offer, and a student can look strong in one framework and ordinary in another for exactly that reason.
藤校官网写的是什么分数
哈佛在 2025 年入学季恢复提交 SAT 或 ACT 的要求，官网同时明确说不设 IB、A-Level 与 AP 之间的换算公式。2028 届新生的 SAT 中间 50% 落在 1490 到 1580，这是哈佛招生官网公布的数字，除此之外它只给课程难度和高中背景的描述。耶鲁走的是 test flexible：SAT、ACT、AP、IB 都能作为标化提交，走 AP 路线通常需要多门 5 分，IB 路线看总分和 HL 组合。普林斯顿和哥伦比亚的表述每年都在微调，申请前要按当年的 FAQ 逐条核对，别拿上一届的经验直接套。藤校不给换算表，这件事本身就是信号：它们要的是你在自己体系里的位置，不是一个折算后的分数。准备材料时先确认该校当年接受哪几种考试，再决定要不要考 SAT。
Harvard reinstated the SAT or ACT requirement for students entering in 2025 and says plainly that it publishes no conversion table between IB, A-Level and AP. Its class of 2028 profile puts the middle 50% SAT range at 1490 to 1580, a figure taken from the admissions office website, and beyond that it describes course rigour and school context rather than scores. Yale runs a test-flexible policy that accepts SAT, ACT, AP or IB results, with an AP route usually meaning several fives and an IB route read through the total and the higher level mix. Princeton and Columbia revise their wording most years, so check the current FAQ instead of relying on last year's version.
G5 的课程页门槛
牛津 2027 入学的 A-Level 要求从 AAA 到 A*A*A，IB 大多写 38 到 40 分，HL 需要 766；剑桥写 A*AA 到 A*A*A，IB 40 到 42 分，HL 776；帝国理工多数工程专业是 A*A*A 到 A*AA，IB 39 到 41；UCL 跨度最大，从 A*A*A 到 ABB；LSE 以 A*AA 到 AAB 为主，IB 37 到 38 分，HL 666。这些数字来自各校课程页，同一个学校不同专业的差距比学校之间的差距更大，所以先定专业再查页，比笼统记一个校名有用。还要注意 conditional offer 的写法：牛津剑桥经常把条件写成具体等级，比如数学专业要求 A*A*A 且数学和进阶数学为 A*，差一个等级就是没达线。专业之间的差异也很具体，剑桥的自然科学和工程在数学要求上不同，UCL 的教育学和法学也差着几个等级。查页时看三个位置：A-Level 要求、IB 总分与 HL、以及有没有指定科目。
Oxford lists A-Level offers from AAA to A*A*A for 2027 entry, with IB requirements mostly at 38 to 40 points and 766 at higher level. Cambridge asks for A*AA to A*A*A, or 40 to 42 IB points with 776 at higher level. Imperial's engineering courses sit around A*A*A to A*AA and 39 to 41 IB points, UCL spans A*A*A down to ABB, and LSE mostly asks A*AA to AAB with 37 to 38 IB points. The spread within one university is wider than the spread between universities, and Oxford and Cambridge often name the exact grades inside the offer, so one grade below the named subject can lose the place.
单科比总分更容易卡人
很多学生以为总分到了线就稳了，真正被拒的案例里，单科不匹配占的比例不低。剑桥的工程专业要数学和物理，化学工程还要化学；帝国理工的航空工程不接受用商务或会计替掉物理；医学方向几乎都要求化学，加上生物或数学。IB 这边看 HL 组合，申经济常见 HL 数学加经济，申工程要 HL 数学和物理，语言类科目很难替代。AP 申请英国时，学校会指定科目，比如三门 5 分里必须包含微积分和物理，拿环境科学凑数没有用。分数达标只是第一层筛子，科目对不对得上专业，是第二层。学校根本不提供那门课时，换专业方向比硬补更现实。具体要求写在课程页的 entry requirements 里，不在学校总览页。
A total that clears the published line is not the end of the story, and subject mismatch sinks a fair share of otherwise strong applications. Cambridge engineering expects mathematics and physics, chemical engineering adds chemistry, and Imperial aeronautics will not accept business or accounting in place of physics. Medicine almost always wants chemistry plus biology or mathematics. For IB candidates the higher level mix is what counts, while UK departments reading AP results name the subjects they need, so three fives in unrelated exams do not carry the same weight as calculus and physics.
选课组合怎么排
A-Level 学生常问要不要考四门。大学 offer 基本按三门发，第四门只在两种情况有用：进阶数学作为数学类专业的补充，或者学校本身要求四门。把三门考到 A*A*A，比四门各拿 A 更划算，后者还多占一份备考时间。IB 的关键在 HL 的 776 能不能凑出来，三门 HL 都选轻松的科目，总分再高也会在专业匹配上吃亏。AP 的常见错误是堆数量，八门里五门是环境科学、心理学这类与专业无关的科目，招生官看的是难度和相关性，不是门数。选课表一旦定下来，改动的成本很高，排之前先把目标专业的 subject requirements 抄下来对着看。AS 成绩在多数学校只作参考，最终 offer 还是看 A2 的三门。同一门课在不同考试局的难度也不同，选之前问清楚学校开的是哪个版本。
A-Level students often ask whether four subjects beat three. Most offers are built on three, and a fourth only helps in two cases: further mathematics as the extra subject for a maths-heavy course, or a school that explicitly asks for four. Three grades at A*A*A beat four at A, and the fourth subject also costs revision time. For IB the question is whether the 776 at higher level can be assembled, since three soft higher level subjects weaken the application however high the total. AP applicants tend to over-count, and eight exams with five in unrelated subjects impresses nobody.
英美双申的时间线会撞车
2027 入学的关键日期集中在秋季到次年一月。牛津、剑桥和多数医学专业走 10 月 15 日的 UCAS 截止；美本早申多在 11 月 1 日，常规轮在 1 月 1 日前后；UCAS 主轮截止是 1 月 14 日，这个日期 UCAS 官网每年都会重申。三件事挤在同一个学期，推荐信、个人陈述、剑桥的补充问卷和面试准备会同时压过来。A-Level 学生还要处理预估分：英本靠预估分拿 conditional offer，美本要 mid-year report，两边要的是同一批老师的同一批材料，早一点开口比临时催有用。把每个截止日写进同一个日历，比记在脑子里可靠。两边的考试时间冲突时，先保英本的截止，conditional offer 的达线要求是硬性的。
For 2027 entry the dates cluster between autumn and the following January. Oxford, Cambridge and most medical courses close through UCAS on 15 October, US early rounds mostly fall on 1 November, regular decision sits around 1 January, and the main UCAS deadline is 14 January, a date the UCAS website restates each cycle. Three processes land in one term, so references, personal statements, the Cambridge questionnaire and interview preparation compete for the same weeks. Predicted grades add another layer, since UK offers depend on them while US schools want a mid-year report from the same teachers.
分数够却没拿到 offer 的几种情况
说实话，分数只是入场券。牛津剑桥的面试和入学考试权重很高，PAT、ESAT、TMUA、STEP 这些考试的成绩经常比 A-Level 预估分更能拉开差距，面试里的解题过程也会被单独打分。美本的文书和活动列表承担了大量判断，标化满分被拒的案例每年都有，学校看的是你在自己环境里做成了什么。语言成绩也常被忽略：英国学生签证和部分专业对雅思或托福有单独要求，美本对国际生通常也有最低线，这些都要在申请前查学校官网的 international 页面，而不是等 offer 下来才补。任何一项缺位，分数再漂亮也会停在候选名单上。语言成绩要留出考试和送分的周期，临时补往往赶不上截止日。
Scores buy a ticket, not a seat. Oxford and Cambridge weight interviews and admissions tests heavily, and a PAT, ESAT, TMUA or STEP result often separates candidates more than predicted grades do, with the interview itself scored on how a problem is worked through. US applications lean on essays and activities, and perfect test scores are turned down every year. English proficiency is the quiet failure point: UK visas and some courses set their own IELTS or TOEFL requirements, and US colleges publish minimums for international applicants, all of which belong on the checklist before deadlines rather than after an offer.
现在能做的四件事
把目标专业定下来，去对应学校官网的 course page 抄下 A-Level、IB、AP 三套要求，这是所有规划的起点。然后对照自己学校的选课表，看差哪一门，还能不能在下一学年补上，补不上就换专业方向，别硬撑。标化按考试日历倒排，托福或雅思留出两次考试的时间，AP 和 IB 的五月大考不要和美本截止撞在一起，成绩出分的时间也要算进去。最后，每年八月到九月重新核对一次官网数字，课程页和截止日期都可能变，去年保存的截图不能当依据。计划表上留一个缓冲月，考试取消、材料补交这类事每年都会发生。
Start by fixing the target course and copying its A-Level, IB and AP requirements from the university course page. Compare that list with what your school actually offers, work out which subject is missing and whether it can still be added, and change direction if it cannot. Then build the test calendar backwards, leaving room for two sittings of IELTS or TOEFL and keeping the May exam session clear of US deadlines. Finally, re-check the official pages each August or September, because requirements and dates do move and last year's screenshot is not evidence.
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