IB Biology HL Grade Boundaries 2025: Complete Breakdown

Paper 3 (out of 45)

• Grade 7: 35–45
• Grade 6: 28–34
• Grade 5: 21–27
• Grade 4: 14–20
• Grade 3: 9–13
• Grade 2: 5–8
• Grade 1: 0–4

Practical Work (out of 24)

• Grade 7: 20–24
• Grade 6: 17–19
• Grade 5: 14–16
• Grade 4: 11–13
• Grade 3: 7–10
• Grade 2: 4–6
• Grade 1: 0–3

Final IB Biology HL Grade Boundaries (out of 100)

• Grade 7: 79–100
• Grade 6: 64–78
• Grade 5: 50–63
• Grade 4: 35–49
• Grade 3: 23–34
• Grade 2: 13–22
• Grade 1: 0–12

Tips for Scoring in the Top Grade Ranges

• Paper 1 (MCQ): Practice timed multiple-choice exams and focus on key terminology.
• Paper 2: Review command terms and practice data analysis and extended-response questions.
• Paper 3: Focus on experimental design, analysis, and evaluation.
• Practical Work: Keep thorough lab notes, reflect on methodology, and analyze data accurately.

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Frequently Asked Questions (FAQs)

1. Why are grade boundaries different for each paper?

Each assessment emphasizes different skills—conceptual knowledge, data analysis, extended responses, and practical skills. Boundaries reflect the difficulty and historical performance of each paper.

2. How much does each assessment impact my final grade?

All components contribute to the final mark out of 100. Weakness in any area can reduce your overall grade, even if other components are strong.

3. Which assessment is considered the hardest in HL?

Many students find Paper 3 challenging due to experimental design and analysis questions.

Conclusion

Success in IB Biology HL requires a strong grasp of concepts, practical skills, and exam strategies. Knowing the exact grade boundaries allows students to plan effectively, set realistic goals, and maximize final grades.

RevisionDojo provides targeted guidance and strategies to help students achieve their best results.

Grade Boundaries at a Glance (IB Biology HL 2025)

Paper 1 (MCQ) (40)
7: 34–40 | 6: 29–33 | 5: 24–28 | 4: 19–23 | 3: 17–18 | 2: 11–16 | 1: 0–10

Paper 2 (72)
7: 56–72 | 6: 44–55 | 5: 33–43 | 4: 21–32 | 3: 11–20 | 2: 6–10 | 1: 0–5

Paper 3 (45)
7: 35–45 | 6: 28–34 | 5: 21–27 | 4: 14–20 | 3: 9–13 | 2: 5–8 | 1: 0–4

Practical Work (24)
7: 20–24 | 6: 17–19 | 5: 14–16 | 4: 11–13 | 3: 7–10 | 2: 4–6 | 1: 0–3

Final Grade (100)
7: 79–100 | 6: 64–78 | 5: 50–63 | 4: 35–49 | 3: 23–34 | 2: 13–22 | 1: 0–12

Learn how IB schools use the official exam timetable internally and what it means for students during exams.