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15 Minute IB Calculator Prep For Diploma: Policy and Workflows

15 Minute IB Calculator Prep For Diploma: Policy and Workflows

14 min readOliver Kidd (Co-founder)27 Sep 2026

Calculators are permitted in many IB Diploma Programme papers, but only when they meet strict conditions: no computer algebra system (CAS), no wireless connectivity, cleared memory, and the correct manufacturer exam mode switched on before the paper starts. Miss any one of those, and an otherwise approved device can get you disqualified. Always check the Programme Resource Centre for the current, session-specific list.

TL;DR:

  • Only non-CAS, wireless-disabled calculators in exam mode are permitted, and outdated firmware can lead to disqualification.
  • Graphing calculators like the TI-84 Plus CE and Casio fx-9750 are recommended, but models with built-in CAS or connectivity are banned.
  • Clearing memory and activating exam mode immediately before the exam are essential steps to avoid breaches and disqualification.
  • Exam questions assume access to specific functions such as logarithms, powers, matrices, and numerical solving, making GDCs necessary for Paper 2 and 3.
  • Schools must verify devices beforehand and record checks, since any prohibited feature or stored data can result in disqualification.
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Table of Contents

Which calculators are allowed under the IB calculator policy

The IB groups permitted devices into three broad categories: four-function calculators, scientific calculators, and graphical display calculators (GDCs). For most Diploma Programme mathematics and science papers, a GDC is the practical choice, since examiners write questions assuming students have access to graphing, numerical solving, and statistical functions.

Representative permitted models include several from Texas Instruments, Casio, HP, and NumWorks, though the IB’s own guidance on the use of calculators is explicit that these examples are illustrative, not exhaustive.

  • Texas Instruments: TI-84 Plus family and TI-Nspire CX (non-CAS) models, provided the OS supports Press-to-Test.
  • Casio: fx-9750 and fx-CG series GDCs running approved exam-mode firmware.
  • HP: Prime graphing calculators configured in exam mode with CAS features disabled.
  • NumWorks: N0110 models running the exam-mode firmware build.

Prohibited devices include any calculator with a built-in CAS, a QWERTY-style keyboard, internet or Bluetooth connectivity, or the ability to store text notes and retrieve them during the exam. TI-Nspire CAS editions and HP Prime units left in their default (non-exam) configuration fall into this category automatically. The Programme Resource Centre remains the only source you should treat as final, since manufacturers occasionally update firmware between exam sessions.

Why CAS, Wi-Fi, and stored data get calculators banned

A computer algebra system solves equations symbolically rather than numerically. It can factorise expressions, differentiate functions, and manipulate algebra the way a student would on paper, which is exactly why the IB treats it as an unfair advantage rather than a permitted tool.

Wireless features carry a different risk. A calculator that can transmit or receive data could, in theory, be used to share exam content or receive outside help, so any device with Bluetooth, infrared, or Wi-Fi capability is automatically excluded, switched on or not.

Stored data is the quieter problem. Programmes, saved notes, and archived variables from revision sessions can sit in a calculator’s memory for months, and if an invigilator finds them during a check, that counts as a breach regardless of intent.

Three failure modes account for most avoidable disqualifications:

  • Running an outdated operating system that doesn’t support the required exam mode.
  • Forgetting to erase memory and archived variables before the session.
  • Leaving revision apps or programmes installed that expose prohibited functionality.

The most common of these, according to IB’s own calculator guidance, is the outdated OS problem: a calculator that was fully permitted last year can become non-compliant simply because its firmware never got updated to support Press-to-Test.

How to prepare your calculator for an IB exam

Getting your calculator exam-ready takes fifteen minutes if you do it properly, and considerably longer if you leave it until the morning of the paper. Follow these steps in order, ideally a week before your first exam and again the night before.

  1. Update the operating system. Confirm your model is running the OS version that supports exam mode, following the manufacturer’s own instructions.
  2. Reset the memory. Clear RAM, delete stored programmes, and remove archived variables, not just recently used ones.
  3. Remove third-party apps. Uninstall anything that could expose prohibited functions, even revision tools you built yourself.
  4. Activate exam mode immediately before the paper. Use Press-to-Test on TI-Nspire models, or the equivalent “Examination Mode for IB” setting on Casio, HP, and NumWorks devices.
  5. Do not touch the device again until the invigilator has checked it. Reactivating or exiting exam mode mid-session is treated the same as never having entered it.

Pro Tip: Practise the exam-mode activation sequence at least twice before results actually matter. Students who only do it once, weeks in advance, often fumble the code entry or reset step under real exam pressure, and that’s the moment invigilators notice.

Invigilators are trained to confirm exam mode is genuinely active, not just that the calculator is switched on, and different manufacturers use different verification sequences. Texas Instruments publishes its Press-to-Test code entry process separately from Casio’s own confirmation screen, so familiarity with your specific model matters more than general knowledge of “the rules.”

Calculator exam mode verification sequence

Calculator rules by paper: what examiners expect you to use

Not every paper allows a calculator, and knowing which ones do shapes how you should be practising in the months before exams. Paper 1 in most mathematics courses restricts or bans calculator use entirely, testing whether you can manipulate expressions and solve problems by hand. Paper 2 and Paper 3, by contrast, generally require a GDC and are written assuming you have one.

Examiners assume access to a specific set of minimum functions when they draft GDC-dependent questions:

  • Logarithms in base 10 and natural log (ln)
  • Powers and roots (xy and x1/y)
  • π and standard trigonometric and inverse trigonometric functions
  • Exponential functions (ex)
  • Numerical equation solving
  • Numerical derivative and integral evaluation
  • Matrix operations, where the syllabus requires them

A scientific calculator without graphing or numerical-solve capability leaves you at a real disadvantage on Maths AA and AI papers, since some question types are effectively unanswerable without a GDC. The minimum functionality guidance is worth reading in full if you’re choosing a device for the first time. Whichever GDC you settle on, stick with the same one throughout the two-year course. Switching models close to exams means relearning menu structures under time pressure, which is the last thing you want on Paper 2.

What coordinators and invigilators must check

School responsibilities under the IB calculator policy split roughly into two roles. The DP coordinator ensures the policy itself is communicated to students and staff, and that pre-exam checks are actually scheduled rather than assumed.

Invigilators carry out the checks themselves:

  • Spot-checking calculators before the session for prohibited models or features.
  • Confirming exam mode or Press-to-Test is genuinely active, not just that the screen looks normal.
  • Clearing memory at the end of each session, a step the IB made explicitly mandatory to stop questions or notes being retained between papers.
  • Recording and reporting any breach, since schools must keep evidence available for IB inspection.

A project management tool built for checklists and administrative tracking can help coordinators structure these routine checks so nothing gets missed across a large cohort.

Building real fluency with permitted GDC workflows

Knowing the rules gets you into the exam room. Knowing your calculator gets you through the paper. The two are different skills, and the second one only comes from repetition under time pressure, not from reading a settings menu once in September.

Practice that actually builds speed looks like this:

  • Timed topic drills on numerical solve, graphing windows, and statistical regression, repeated until the keystrokes are automatic.
  • Full timed mock papers that force you to manage calculator use alongside the clock, not just the maths.
  • Reviewing examiner mark schemes against your own working, so you see exactly where a faster GDC workflow would have saved minutes.

Tiber Tutor’s test builder lets you generate topic-specific drills on demand, while full mock exams rehearse the exam-mode routine under realistic time pressure. Performance analytics then show exactly which permitted functions are costing you time, something a generic revision guide simply cannot track.

Compliance and fluency both decide your final score

Compliance gets treated as a formality by most students, until it isn’t. A cleared memory and a correctly activated exam mode matter as much on results day as knowing how to use the calculator once it’s switched on. Teachers who build a thirty second exam-mode check into every timed class test, rather than saving it for the real exam, quietly remove one of the most common and entirely avoidable sources of lost marks.

— Oliver

Practise permitted calculator workflows with Tiber Tutor

Reading the rules is one thing. Being fast and accurate with a permitted GDC under real exam pressure is another, and that only comes from repetition against material that actually mirrors what examiners ask. Tiber Tutor is built by practising IB examiners, which means every exam-style question, mock exam, and mark scheme reflects the actual paper structure and functions you’ll be expected to use, not a generic approximation of it.

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The test builder lets you generate calculator-heavy drills on exactly the topics giving you trouble, while full mock exams under timed conditions rehearse the whole routine, from exam mode activation to the final numerical solve. Student-led answer review against examiner mark schemes shows precisely where a faster calculator workflow would have earned extra marks, and the performance analytics track that progress over time in a way no generic revision guide can. Take the All-Access Plan or a Per-Subject Plan at $19 or $9 a month and start practising ahead of your next paper.

Where to check the official IB calculator rules

  • The Exam calculator policy and Programme Resource Centre hold the current permitted and prohibited model lists.
  • Manufacturer pages from Texas Instruments, Casio, HP, and NumWorks give exact exam-mode activation steps for each model.

Sources

FAQ

What calculators are allowed in IB?

Four-function, scientific, and graphical display calculators (GDCs) are allowed, provided they lack CAS, wireless connectivity, and stored notes, and are placed in the correct manufacturer exam mode. The Programme Resource Centre holds the current permitted model list, since specific approvals can change between exam sessions.

Is TI-84 Plus CE allowed on exams?

Yes, the TI-84 Plus CE is a permitted GDC for IB exams, as it has no CAS functionality and no wireless capability by default. Students should still confirm the OS is current and clear the calculator’s memory before the session, following Texas Instruments’ own exam guidance.

Is 40 IB predicted good?

A predicted high IB score is a strong result, sitting well above the typical global average and firmly in the range universities associate with competitive applicants. Reaching it consistently in Maths and science papers usually means timed practice with permitted calculator workflows, since GDC speed and accuracy directly affect how many questions you complete.

Is a TI-Nspire CAS allowed in IB exams?

No, the CAS edition of the TI-Nspire is prohibited because it can manipulate algebra symbolically. Only non-CAS TI-Nspire models running Press-to-Test firmware are permitted.

Do calculators need to be reset between exam sessions?

Yes, IB’s enhanced assessment procedures require memory to be cleared at the end of each session to stop stored questions or notes carrying over. Invigilators are responsible for confirming this happens, and schools must keep records available for IB inspection.