Boundary unavailable for May 2025 (m25)

Reverted to May 2024 (m24) for this subject.

Marine Science

IB Marine Science is a Group 4 school-based syllabus (SBS) course exploring the science of ocean systems, marine ecosystems, and the impact of human activity on the marine environment. This IB Marine Science grade calculator helps students predict their final exam score.

Group 4: Sciences Astronomy Biology Chemistry Computer Science

Subject

Syllabus

Unknown to Present

Level

Grade boundaries

Session

May 2025 (m25)

Timezone

Assessment inputs

Enter raw marks below — grades calculate live.

Unknown

Paper 1

Max 65 marks

50%

/ 65

Paper 2

Max 35 marks

30%

/ 35

Internal Assessment

Max 24 marks

20%

/ 24

More Group 4: Sciences

These related subject routes strengthen the crawl path around this IB group and give students a faster way to compare adjacent subjects.

View full Group 4: Sciences

Astronomy

Astronomy is the study of the universe and its contents outside of Earth's atmosphere, including the positions, motions, and properties of celestial objects.

Biology

IB Biology is a Group 4 experimental science course covering the vast diversity of life from the molecular to the macro level.

Chemistry

IB Chemistry is a Group 4 experimental science combining academic study with practical and investigational skills.

Computer Science

IB Computer Science is a Group 4 course requiring an understanding of computational thinking, programming, and how computers and digital devices operate.

Historical grade boundaries

Every published boundary across 5 sessions. Multiple dots per session are timezone variants.

5 sessions5 data points

Global grade distribution for SL Marine Science

Based on May 2024 results for SL Marine Science (407 candidates).

Session M24Average 3.8407 candidates

7.9%

2.5%

16.2%

24.3%

22.9%

12%

9.1%

5.2%

Avg 3.8 · 407 candidatesSession M24

Grade N7.9%

Grade 12.5%

Grade 216.2%

Grade 324.3%

Grade 422.9%

Grade 512%

Grade 69.1%

Grade 75.2%

Common questions about Marine Science

What levels are available for IB Marine Science?

Marine Science is currently mapped with SL calculator input on calculateIB.

Which syllabus versions are included for IB Marine Science?

This page tracks 1 syllabus version: Unknown to Present.

How are IB Marine Science boundaries handled on this page?

The page checks the selected exam session first. If that boundary is unavailable, it falls back to May 2024 and then to the nearest available session, while keeping the fallback local to this subject route.