Biology
IB Biology is a Group 4 experimental science course covering the vast diversity of life from the molecular to the macro level. The IB Biology course emphasizes practical investigation, data analysis, and scientific communication across both SL and HL. This IB Biology grade calculator helps students predict their final exam score.
Assessment inputs
Enter raw marks below — grades calculate live.
Paper 1
Max 75 marks
Paper 2
Max 80 marks
Individual Investigation
Max 24 marks
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.
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.
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.
Design Technology
IB Design Technology is a Group 4 course placing inquiry and problem-solving at its heart, using the design cycle to analyse problems, develop solutions, and evaluate prototypes and products.
Historical grade boundaries
Every published boundary across 12 sessions. Multiple dots per session are timezone variants.
Best place to gain marks
One mark is worth more in some parts than others. The top items give you the biggest boost to your final score.
1. Individual Investigation
+0.83%final score for 1 mark
20% weight · max 24 marks
2. Paper 2
+0.55%final score for 1 mark
44% weight · max 80 marks
3. Paper 1
+0.48%final score for 1 mark
36% weight · max 75 marks
Common questions about Biology
What levels are available for IB Biology HL?
Biology HL is currently mapped with HL calculator input on calculateIB.
Which syllabus versions are included for IB Biology HL?
This page tracks 2 syllabus versions: 2025 to Present, 2016 to 2024.
How are IB Biology HL 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.