You’ve probably been sitting with a predicted grade that doesn’t feel like you. Maybe you scraped a 4 on your last mock. Maybe your teacher has never quite explained what you’re actually aiming for. Maybe you’ve been quietly wondering if a 7 is even possible for someone at your current level.
I want to answer that question properly. Not with vague encouragement. With actual numbers.
Because here is the thing most students don’t know:
You do not need 90% to get a 7 in IB Physics.
In fact, most years, you need somewhere around 65 to 70 percent.
That changes everything, doesn’t it?
In this guide, I’ll walk you through:
- What IB Physics grade boundaries really are
- How they’re decided
- The complete SL and HL grade boundaries from 2016 to 2023
- How the current IB Physics syllabus (first examined 2025) may affect them
- How to use grade boundaries strategically
- A free IB Physics grade calculator to estimate your current grade
Let’s make this simple. And powerful.
What Are IB Physics Grade Boundaries?
A grade boundary is the minimum percentage required to achieve each grade (1–7).
For example:
In November 2023, the grade boundary for a 7 in IB Physics SL was 70%.
That means you needed an overall percentage of 70 across all components.
Not 90. Not perfection. Just 70.
Now here’s where students get confused.
Your final IB Physics percentage is calculated using different weightings:
- Paper 1
- Paper 2
- Scientific Investigation
That’s why I built a simple grade calculator for you below, so you can see where you actually stand.
Before we get there, let’s look at the big picture.
Average Grade Boundaries for a 7
Across recent years, the averages are approximately:
- IB Physics SL: 65%
- IB Physics HL: 68%
Yes. Really.
Crazy low, right?
But don’t aim for the average. Aim slightly higher so you’re safe in tougher years.
How Are IB Physics Grade Boundaries Determined?
This is important.
They are not set using a bell curve.
The IB uses grade descriptors. These describe what a student at each level should be capable of doing.
Lead examiners:
- Review the exam paper
- Compare performance to the descriptors
- Decide which mark range best fits each level
It’s a best-fit judgement process.
If the exam is harder, boundaries go down. If the exam is easier, boundaries go up.
The IB adjusts based on the paper difficulty, not to force a percentage of students into each grade.
That’s good news for you.
Complete IB Physics Grade Boundaries (2016–2023)
Below are the official SL and HL grade boundaries.
Standard Level (SL)
| Year | Timezone | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| M19 | TZ1 | 0 | 13 | 22 | 32 | 42 | 54 | 65 |
| M19 | TZ2 | 0 | 13 | 23 | 35 | 46 | 56 | 66 |
| N19 | TZ0 | 0 | 14 | 25 | 36 | 46 | 57 | 67 |
| N20 | TZ0 | 0 | 14 | 25 | 35 | 45 | 56 | 68 |
| M21 | TZ1 | 0 | 12 | 18 | 25 | 34 | 48 | 62 |
| M21 | TZ2 | 0 | 10 | 15 | 26 | 37 | 50 | 63 |
| M22 | TZ1 | 0 | 11 | 20 | 27 | 37 | 47 | 58 |
| M22 | TZ2 | 0 | 12 | 21 | 32 | 43 | 54 | 65 |
| N22 | TZ0 | 0 | 13 | 22 | 30 | 40 | 49 | 59 |
| M23 | TZ1 | 0 | 11 | 21 | 32 | 44 | 56 | 68 |
| M23 | TZ2 | 0 | 12 | 22 | 35 | 45 | 55 | 65 |
| N23 | TZ1 | 0 | 15 | 28 | 43 | 51 | 61 | 70 |
| N23 | TZ2 | 0 | 15 | 28 | 43 | 51 | 61 | 70 |
Higher Level (HL)
| Year | Timezone | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| M19 | TZ1 | 0 | 13 | 23 | 34 | 45 | 56 | 67 |
| M19 | TZ2 | 0 | 15 | 26 | 39 | 49 | 60 | 70 |
| N19 | TZ0 | 0 | 15 | 26 | 39 | 49 | 59 | 69 |
| N20 | TZ0 | 0 | 16 | 30 | 44 | 53 | 64 | 73 |
| M21 | TZ1 | 0 | 12 | 18 | 25 | 36 | 52 | 69 |
| M21 | TZ2 | 0 | 14 | 20 | 29 | 39 | 54 | 69 |
| M22 | TZ1 | 0 | 12 | 19 | 27 | 38 | 50 | 63 |
| M22 | TZ2 | 0 | 15 | 25 | 35 | 46 | 58 | 70 |
| N22 | TZ0 | 0 | 13 | 21 | 30 | 40 | 52 | 65 |
| M23 | TZ1 | 0 | 12 | 21 | 32 | 44 | 56 | 68 |
| M23 | TZ2 | 0 | 14 | 24 | 37 | 47 | 58 | 69 |
| N23 | TZ1 | 0 | 15 | 26 | 39 | 49 | 59 | 69 |
| N23 | TZ2 | 0 | 15 | 26 | 39 | 49 | 59 | 69 |
Notice the range.
A 7 in HL has been as low as 63 percent and as high as 73 percent.
That’s why strategy matters.
How the Current IB Physics Syllabus May Affect Grade Boundaries
The current IB Physics syllabus (first examined 2025) introduced:
1. Data-Based Questions
More structured, database-style questions.
If you practise these properly, they are extremely scoreable.
2. New Exam Structure
Paper 1A, Paper 1B, and Paper 2.
Different weightings mean boundaries may shift slightly compared to the old structure.
3. No Penalty for Incorrect Answers
Paper 1A explicitly states that no marks are deducted for incorrect answers.
That encourages students to attempt everything.
More attempts can slightly raise average scores, which can influence boundaries.
Will 7s suddenly require 80 percent?
No.
Historically, IB Physics boundaries remain in the mid to high 60s.
Free IB Physics Grade Calculator (SL & HL)
Use this to estimate your overall percentage and predicted grade. Enter your marks and click calculate.
Standard Level (SL)
Higher Level (HL)
Use it after every mock. Track your progress over time. Make your revision data-driven.
What to do with your result
If you’re sitting at 65% or above (SL) or 68% or above (HL): you’re at the 7 boundary on average. Your job now is not to learn more, it’s to stop losing marks you could already be earning. Work on your weakest topics and practise timed past papers.
If you’re sitting at 55 to 64% (SL) or 57 to 67% (HL): you’re in the 6 zone. One grade jump is very much within reach. The gap between a 6 and a 7 is usually a handful of marks, spread across the paper. Topic-by-topic past paper practice is how you find those marks.
If you’re sitting below 55% (SL) or below 57% (HL): this is not a ceiling. This is a starting point. I’ve seen students jump three grades in a single year with the right approach. What changes everything is not working harder, it’s understanding exactly what the examiner is looking for and practising that consistently.
How to Use Grade Boundaries Strategically
Here is what high-scoring students do differently.
1. Aim Above the Average
If HL averages 68 percent for a 7, aim for 72 percent in practice.
Build margin.
2. Fix Weak Topics First
Most students revise what feels comfortable.
That is a mistake.
Work on your weakest topics until they stop being weak.
That is how 4s turn into 6s.
3. Practise Like an Examiner
IB Physics is not about memorising more content.
It is about recognising question patterns.
All my IB Physics video tutorials are completely free on YouTube and here on GradePod.
If you want structured, topic-by-topic past paper packs with markschemes organised properly and designed to build exam technique, that is exactly what the Exam Pack is for.
You do not need perfection.
You need clarity. You need structure. And you need consistent exam-focused practice.
I promise, it works.
Get the GradePod Exam Pack for £39 →
Written by Sally Weatherly, IB Physics teacher since 2004, Fellow of the Institute of Physics, and founder of GradePod. I help students work smarter, not harder.