IB data booklet: how to use it in the exam

Every IB science and maths student meets the same booklet in the exam hall and most meet it for the first time far too late. They flip pages hunting for one constant while the clock runs, or they quote a value from memory that is slightly wrong. A few hours of deliberate practice with the real layout removes both problems, and it is one of the cheapest improvements available before the exams.

One important point first. This page describes how the booklets are organised and how to use them. It does not reproduce their contents, which belong to the IB. Ask your school for the official copy for your subject and exam session, or look for the current version from the IB Diploma Programme pages. Booklets are revised from time to time, so always practise from the edition your school will use in your sitting.

Which IB booklets exist and who uses them

The booklet you receive depends on the subject and course.

The AA and AI booklets are not interchangeable. If you sit one course and practise from the other, you will look for formulae that are not there. Our overview page, IB formula booklets, links to each of them, and the sheets we publish are our own revision material, built alongside the official documents rather than replacing them.

What the booklet gives you, and what it does not

This is the most useful thing to learn about any booklet. Its purpose is to supply reference material: values you could not reasonably remember to many significant figures, tables that are long, and equations that are awkward. It does not supply understanding, and it does not supply everything you need.

Typically in the booklet

• Physical and chemical constants, given to a stated precision.
• Information such as unit prefixes, and tables of data you would otherwise have to memorise.
• A set of equations that you must be able to select and apply correctly.
• In Chemistry, a periodic table and data tables used in several topics.

Typically not in the booklet

• Definitions. You will be asked to state or define terms in words. The booklet will not help.
• Reasoning. It will not tell you which equation fits a situation, or why it does.
• Many basic relationships that the IB expects you to know as part of the course. Where the line is drawn differs by subject and edition.
• Meaning of the symbols in a context beyond a short key. You still have to know what each quantity represents.

Don't guess where that line is. The best single task in this guide is the next one: sit with a clean copy and make your own list of "things I need that are not in here". That list is your memory work. Start by comparing your copy with the subject guide's topic list, and ask your teacher about anything uncertain.

The rules: no tabs, no notes, no annotations

The official booklet in the exam is a clean document supplied by your school under IB rules. Do not write on, highlight, tab, fold or otherwise annotate the official exam copy, and do not bring in notes inside it. Rules on what you may and may not bring can vary by programme year and by school arrangement, so follow your school's and the IB's current instructions, and ask your coordinator if unsure. Breaking these rules can put your results at risk, and it is never worth it.

The good news is that you do not need annotations. The same time can go into practice with a clean copy. Print or download an unmarked version for revision, and mark that one however you like: highlight, add sticky notes, draw boxes. Then do your timed practice from a fresh, clean copy so you train on what you will actually see.

How to find things fast in the exam

Speed with a booklet is mostly a map in your head. You do not need to know the numbers. You need to know where a thing lives.

1. Learn the structureOpen your booklet and read the contents page or headings once. Note how the sections are ordered: by theme, by topic, or by type of information.
2. Know the neighboursItems related in the course sit near each other. If you can place a topic, you can place its equations within a page.
3. Know the page numbers of the five things you use mostMany students use a small set of constants and tables repeatedly. Learn their pages as you learn a phone number.
4. Write the symbol, then look up the valueIdentify the quantity first, then flip. Flipping first leads to grabbing the wrong constant.
5. Record the page quickly in your workingA short label next to the value helps you re-check in the last minutes.

A practical test: choose ten quantities at random, say a constant, a unit, a table value and an equation, and time how long you need to find each. Repeat after a week. Most students halve their time with two sessions.

Units and constants: the quiet source of lost marks

Most booklet-related errors are not about finding the wrong page. They are about using the right number carelessly.

• Check the unit that comes with the value. A constant may be in a unit that does not match the rest of your data, such as grams against kilograms, or kilojoules against joules. Convert before you substitute.
• Match precision to the data. You do not need to enter every digit of a constant. Keep at least one more significant figure than the answer needs, then round at the end.
• Similar-looking constants. Two quantities with similar symbols or magnitudes are easy to swap. Say the name of the quantity in your head as you copy the value.
• Powers of ten. Read the exponent twice. A missed minus sign changes everything.
• Prefixes. Convert nano, micro, milli, kilo and mega at the start. Never carry a prefix through the calculation.

When I mark practice papers for IB Physics, the largest group of booklet slips is a correct method with a wrong power of ten, usually a prefix converted twice or not at all.

Common errors with the IB data and formula booklets

Wrong constant for the situation

Some constants look similar, or the same letter can stand for different quantities in different topics. Before you substitute a value, check that its name matches what the question describes.

Wrong form of an equation

An equation may appear in more than one form, or several related equations may sit side by side. The booklet shows the relationship, not the conditions under which it applies. Ask whether the equation is valid for your case: uniform or changing, ideal or real, small angles or not.

Mixing up SL and HL content

Higher level includes material that standard level does not. Depending on the edition, a booklet may contain material for both levels. Using an HL-only relationship in an SL answer is usually a sign you are following a method outside your course, and check with your teacher whether your edition marks what is HL only. The reverse also happens: HL students forget that extra equations exist for them.

Assuming the booklet has what it does not

Students lose time searching for an equation that is not there. If you cannot find it in a reasonable time, it is probably meant to be known. Move on and come back.

Trusting a calculator or memory over the table

If a question asks for a value that appears in the booklet, use the booklet value. A remembered approximation may shift your final significant figure and cost an accuracy mark.

Practise with the real layout

The most effective booklet practice is with the document itself. Paper layouts differ from site to site, and a student who has only ever used a friend's summary sheet loses time in the exam looking for a different arrangement.

• Do past-paper work with the booklet open, not with your own notes. Use a timer.
• After each question, write which part of the booklet you used. After a month you will see which pages you rely on.
• Practise recognising the right equation from the question wording before you open the booklet. If you can name the equation, the booklet only confirms its form.
• For Maths, combine it with your calculator skills, because the formulae and the technology work together. Our guide to the IB Maths GDC covers that side.

For the physics side, IB Physics exam papers: Paper 1A, 1B and 2 explained shows where the booklet matters most in each paper, and the Chemistry sister article on Paper 1A and 1B does the same. Questions that ask for an answer from a given data set often depend on picking the right constant and unit, so work through the guide to uncertainties in IB Physics as well.

A revision routine that makes the booklet automatic

1. Week 1: map itRead your whole booklet once. Mark up an unofficial print as you like. Write your "not in the booklet" list.
2. Week 2: use itDo three or four past-paper questions per week with the booklet open and a timer running. Record the pages you used.
3. Week 3: memorise the gapsLearn your list of definitions and equations that are not provided, using flashcards or a one-page sheet.
4. Week 4: drill speedRun the ten-item lookup test twice. Then do a full timed paper using a clean copy.
5. Every week afterReview one booklet section in the order of your syllabus, and note any slip you made in a recent practice.

Our own one-page revision sheets can help with step three. The IB cheatsheets collect quick-reference pages, and the annotated booklet guides for Physics, Chemistry, Maths AA and Maths AI show how to read each layout. To turn the work into questions, the web practice library has four levels, with two free topics in every course.

When you want to see how your marks translate into a grade, try the IB grade calculator. For a plan that covers your other subjects too, see the IB revision plan by level. If you want help from a teacher, there is also Photon Academy.

For reliable values to cross-check your understanding of constants, the NIST reference on fundamental physical constants and the BIPM page on SI units are authoritative. In an exam you must use the booklet's values, not these, but they help you see why the numbers are what they are.

Questions students ask about the IB booklets

Can I bring my own copy of the data booklet?

Normally your school provides the official, clean copy for the exam. Follow your coordinator's instructions, and do not bring your own annotated version.

Should I memorise what is in the booklet anyway?

Memorise the equations you use constantly, because looking them up costs time on every question. Leave rarely used constants and long tables to the booklet.

Does the booklet change between sessions?

Editions are updated from time to time. Check with your school which edition applies to your exam session, and use that one in practice.

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