IB Physics exam format 2026: A complete guide to papers, timing and structure
The IB Physics exam format consists of two external papers, Paper 1 and Paper 2, together with an Internal Assessment that contributes to the final grade. Paper 1 combines multiple-choice and data-based experimental questions, while Paper 2 focuses on structured problems, calculations, and extended responses. SL and HL follow the same overall assessment structure but differ in exam duration, question volume, and level of difficulty.
Understanding the weighting, timing, and skills tested in each component helps students prepare more strategically for the current IB Physics assessment.
- Overview of all IB Physics papers for SL and HL candidates
- Paper 1: Multiple choice and data-based questions in IB Physics explained
- Paper 2: Short answer and extended response in IB Physics explained
- Paper 3: HL extension questions in IB Physics explained
- How the internal assessment contributes to the final IB Physics grade
- How the IB Physics exam format should shape your revision strategy
- Frequently asked questions
Overview of all IB Physics papers for SL and HL candidates
The current IB Physics [1] syllabus operates under a two-paper external examination model. Paper 1 and Paper 2 together account for 80% of the final grade. The remaining 20% is awarded through the Internal Assessment, which is an individual scientific investigation completed during the course.
One of the most significant structural changes in recent years is the complete removal of the old Paper 3. Under the current syllabus, there is no separate Paper 3. Experimental skills, data analysis, and uncertainty questions have been moved directly into Paper 1B. This is a detail that many students and even some tutors still get wrong, and preparing for a paper that no longer exists is a costly mistake.
The table below provides a full comparison of the IB Physics HL SL structure side by side.
| Component | SL Weight | SL Duration | HL Weight | HL Duration |
|---|---|---|---|---|
| Paper 1 (1A + 1B) | 36% | 1.5 hours | 36% | 2 hours |
| Paper 2 | 44% | 1.5 hours | 44% | 2.5 hours |
| Internal Assessment | 20% | N/A | 20% | N/A |
The structural design is identical at both levels, but HL papers contain more questions, require deeper mathematical reasoning, and carry longer time allocations. Both SL and HL candidates sit Paper 1 and Paper 2. The IA rubric is also identical across both levels.
>>> Read more: IB Physics books 2026: Complete guide for students and teachers
Paper 1: Multiple choice and data-based questions in IB Physics explained
Paper 1 is a single, continuous examination booklet that contains two distinct sections: Paper 1A and Paper 1B. Students receive both sections simultaneously at the start of the exam. The clock runs continuously, and there is no pause or transition period between the two sections.
Paper 1A is the multiple choice section. SL candidates answer 30 MCQs, while HL candidates answer 40 MCQs. These questions test conceptual understanding across the entire syllabus, and at HL they also cover Additional Higher Level material. One critical detail often overlooked is that calculators are permitted throughout Paper 1A, which marks a significant departure from the previous syllabus. Students who have trained themselves to avoid using a GDC during multiple choice are leaving a genuine advantage on the table.
Paper 1B is the data-based and experimental question section. This is where the content formerly examined in Paper 3 now lives. Questions in this section ask students to interpret graphs, process experimental data, calculate uncertainties, evaluate experimental design, and draw evidence-based conclusions. At HL, Paper 1B includes more complex uncertainty calculations and deeper analytical demands.
Time management inside Paper 1
A common mistake we see at Times Edu is students spending too long on difficult MCQs in Paper 1A and arriving at Paper 1B with fewer than 20 minutes remaining. Paper 1B questions are worth a significant number of marks and require written responses, not just circled answers. Allocating roughly one minute per MCQ and banking the remaining time for Paper 1B is a practical benchmark worth training from day one.
The IB Physics data booklet is provided for both Paper 1 and Paper 2. Students do not need to memorise every formula in the syllabus, but they do need to know the booklet well enough to locate any given formula quickly under exam conditions.
>>> Read more: IB Physics HL Mixed Practice Sets 2026: The Smart Way to Master Exam-Style Questions
Paper 2: Short answer and extended response in IB Physics explained
Paper 2 carries the highest weighting of any single component in the IB Physics exam format. At 44% of the final grade, it is the paper that most directly determines a student’s total score. SL candidates sit a 1.5-hour paper, while HL candidates sit a 2.5-hour paper.
The structure of Paper 2 consists of structured short-answer questions and extended-response questions. Short-answer questions typically award between 2 and 6 marks and require calculations, definitions, diagrams, or brief explanations. Extended-response questions demand multi-step reasoning, the application of multiple concepts within a single scenario, and coherent scientific communication.
At HL, Paper 2 is where the real separation between grade bands occurs. The extended response questions at HL are designed to synthesise concepts across different topics, for example, applying wave behaviour principles alongside quantum physics or combining thermodynamics with energy calculations. Students who have studied topics in isolation, rather than building conceptual connections across the syllabus, will find these questions particularly difficult.
What the mark scheme actually rewards
In our experience working with international students preparing for IB Physics, the most frequent error in Paper 2 is misunderstanding what the mark scheme is looking for. IB mark schemes are specific: A correct numerical answer without correct working shown will often receive zero marks if the method is not visible. Every formula used, every substitution made, and every unit stated should be written clearly on the page.
Command terms are another source of lost marks. “Outline,” “explain,” “justify,” and “evaluate” each carry specific marking expectations in IBO Physics assessment. A student who writes a detailed explanation in response to an “outline” command has wasted time. A student who only lists facts in response to an “evaluate” command has failed to meet the demand of the question.
>>> Read more: IB Physics HL Explain Questions : PEE Method for Long Answer Marks
Paper 3: HL extension questions in IB Physics explained
This heading requires a direct and honest clarification: Paper 3 no longer exists in the current IB Physics syllabus.
Under the previous syllabus structure, Paper 3 examined optional topics and experimental skills in a separate booklet. That structure has been retired. The IB has consolidated experimental and data-based assessment into Paper 1B, and the optional topic system has been removed in favour of a unified, fully integrated syllabus.
Students who are using older revision guides, past papers from before the syllabus update, or receiving advice based on the old structure may be preparing for examination components that are no longer part of the IBO Physics assessment. This is one of the clearest areas where working with a specialist tutor who is current with the syllabus makes a measurable difference.
If you have seen references to Paper 3 in study materials for IB Physics, verify the publication date of those materials. Content from the previous syllabus cycle is not directly applicable to the current examination format.
How the internal assessment contributes to the final IB Physics grade
The IB Physics internal assessment is an individual scientific investigation that each student designs, conducts, and writes up independently during the course. It is worth 20% of the final grade and is capped at a maximum word count of 3,000 words. The IA rubric is identical for SL and HL candidates.
The IA is assessed against five criteria set by the IBO:
| Criterion | Focus Area |
|---|---|
| Personal Engagement | Evidence of student ownership and genuine scientific curiosity |
| Exploration | Quality of research question, background theory, and variables |
| Analysis | Data processing, graph interpretation, and statistical treatment |
| Evaluation | Strengths, limitations, and validity of conclusions |
| Communication | Clarity, structure, and correct scientific conventions |
The IA is internally marked by the class teacher and then externally moderated by the IB. This means that the final mark a student receives can shift up or down during moderation, depending on how well the school’s marking aligns with IB standards.
A common mistake we see is students treating the IA as a secondary priority and rushing to complete it in the weeks before the submission deadline. The IA is 20% of the final grade and can be the difference between a 5 and a 6, or between a 6 and a 7. Starting the investigation early, conducting a genuine and measurable experiment, and allocating dedicated drafting and review time is the approach that consistently produces high IA scores in our experience at Times Edu.
One critical detail often overlooked is the difference between personal engagement as a criterion and simply choosing an interesting topic. The IB is looking for evidence within the report itself that the student has made deliberate, independent intellectual choices throughout the investigation. That evidence needs to be explicitly visible in the writing.
How the IB Physics exam format should shape your revision strategy
Understanding the IB Physics exam format is not just academic knowledge. It should directly determine how a student allocates their revision time across the course.
Given that Paper 2 carries the largest single weighting at 44%, the majority of problem-solving practice should be structured around extended response and multi-step calculation questions. Practising with complete, timed Paper 2 papers from the official IB question bank is non-negotiable for students targeting grades 6 and 7.
Paper 1 demands a different kind of preparation. MCQ performance in IB Physics is closely linked to conceptual fluency: The ability to identify what a question is actually testing within the first few seconds of reading it. Drilling individual topic areas through MCQ sets, then reviewing every incorrect answer to diagnose the underlying gap, builds this fluency systematically.
A strategic revision framework
- Weeks 1 to 4: Cover all syllabus topics systematically with worked examples and formula application drills.
- Weeks 5 to 8: Complete Paper 1A sets by topic, then by mixed topic. Review the data booklet daily until location of each formula is automatic.
- Weeks 9 to 10: Introduce timed Paper 1B practice sets, focusing on data interpretation, graph analysis, and uncertainty calculations.
- Weeks 11 to 12: Complete full timed mock papers under exam conditions. Simulate the continuous Paper 1 timing without any pause between 1A and 1B.
- Final 2 weeks: Focus on mark scheme analysis, command term identification, and Paper 2 extended response writing practice.
Students preparing for HL should also audit their understanding of the AHL material separately, as Paper 1A at HL includes 10 additional MCQs covering content that SL candidates are not assessed on.
Drawing on years of experience at Times Edu, the students who perform best in IB Physics are not always the ones who have studied the most content. They are the ones who understand the assessment structure deeply enough to allocate their effort where the marks are concentrated, and who practise under conditions that closely replicate the actual exam.
Frequently asked questions
How many papers are there in IB Physics for SL and HL candidates?
How long is each IB Physics exam paper?
What is the difference between IB Physics Paper 1 and Paper 2?
How many marks is each IB Physics paper worth?
What is the data-based question in IB Physics Paper 1?
What is the difference between IB Physics SL and HL exam formats?
How much is the internal assessment worth in IB Physics?
Conclusion
At Times Edu, our IB Physics specialists work one-on-one with students to map out a personalised academic roadmap from the first lesson through to the final examination session. If you are a student or a parent looking for expert guidance on IB Physics preparation, or if you want to understand how the IB Diploma fits into a broader study-abroad strategy, we invite you to book a consultation with our academic team. The right structure makes all the difference.
