Question 1

Are these grade boundaries official?

Accepted Answer

Yes. The calculator uses official IB grade boundary releases from past exam sessions.

Question 2

How accurate are these grade predictions?

Accepted Answer

They are usually strong when your inputs are realistic. Final boundaries still vary year to year, so borderline cases can move either way. Accuracy is lower for newly introduced courses, such as 2025 science updates, because less historical data exists.

Question 3

Why is this different from my school predicted grade?

Accepted Answer

School predicted grades are teacher judgments based on classwork, mocks, and overall performance. This tool estimates your likely final exam outcome from weighted scores and boundaries. It supports decision-making, but it does not replace your official predicted grade.

Question 4

When are boundaries for the latest session posted here?

Accepted Answer

Usually around September for May examinations and March for November examinations, after IB publishes official boundary files.

Question 5

Why does it show 'Boundary Not Found'?

Accepted Answer

Most often, the subject has too few candidates (commonly under 100 in some November sessions), the syllabus did not exist in that year (for example AA/AI before 2021), or the course was revised later (for example SL Music before 2022). Use 'More details' for subject-level availability.

Question 6

Why does the table say my diploma is not awarded?

Accepted Answer

The calculator applies IB award rules exactly. It will show 'not awarded' if any disqualifying rule is triggered: fewer than 6 subjects, total below 24, E in TOK, E in EE, invalid HL/SL mix (must be 3 HL + 3 SL or 4 HL + 2 SL), at least one grade 1, more than two grade 2s, more than three grade 3s, HL total below 12, SL total below 9 when taking 3 SL subjects, or SL total below 5 when taking 2 SL subjects.

Question 7

How do I replace Group 6 with a subject from Groups 1-5?

Accepted Answer

Go to the Group 6 section on the home page and choose the alternate group. The pad updates automatically to subjects from that selected group.

Question 8

How do I enter multiple Language A subjects for a bilingual diploma?

Accepted Answer

A bilingual diploma is typically awarded when you score at least 3 in two eligible Group 1 language subjects (excluding Literature and Performance). In this calculator, select one Group 1 subject in Group 1, another under Group 2, and optionally a third by replacing Group 6 with Group 1.

Question 9

How does the calculator actually compute grades?

Accepted Answer

Each component score is weighted, combined into a total out of 100, and rounded to the nearest integer. That result is then mapped to the selected session's grade boundaries.

Question 10

Where are older or missing grade boundaries?

Accepted Answer

Current coverage starts at May 2019. Known gaps include May 2020 (exams were canceled) and November 2021 (verified files are still unavailable). If you have reliable files for missing sessions, send them so they can be added.