How Many Hours of Practical Work Are Required in IB Sciences?

RevisionDojo
2 min read

📋 IB Science Practical Requirements: How Much Is Enough?

In IB Group 4 sciences (Biology, Chemistry, Physics, ESS, SEHS), students must complete:

  • 40 hours of practical work at Standard Level (SL)
  • 60 hours at Higher Level (HL)

👉 See full breakdown in What Are the Specific Requirements for a Science IA?

🧪 IA vs. General Practical Time

Of those hours, around 10 hours are reserved for your internal assessment (IA). The remaining time is for lab experiments, fieldwork, and simulations.

👉 Learn more in the Complete Guide to IB Biology

🕒 How the Time Is Divided

Subject Level Total Practical Hours IA Work (~) Class Labs, Simulations Standard Level (SL) 40 10 hours 30 hours Higher Level (HL) 60 10 hours 50 hours ESS (SL/HL) 30 included 30 hours

👉 Plan smart using How Much Time Should I Spend on My IA?

✅ Track Your Progress

Keep a lab log or PSOW (Practical Scheme of Work) updated with your experiments. Some schools also log the Group 4 Project (~10 hours) within the required time.

👉 For Group 4 overview, check Group 4 Project Requirements

❓FAQs

Q1: Are these hours mandatory or suggested?
A: They are strongly recommended by IB. Schools are expected to ensure students complete the required hours.

Q2: What if I don’t hit the hour mark?
A: While there's flexibility, consistently missing hours may affect your readiness for the IA or external moderation.

Q3: Can I complete labs outside school?
A: Yes, if approved. See Can I Do the IB Science Lab Outside of School?

📘 Final Tips & Tools

IB practical hours are about building hands-on scientific literacy. They also support the skills you’ll need to write a successful IA.

🎯 Ready to plan your lab work better?

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