IB Diploma Grade Calculator (7–1 Scale)

Use this free IB Diploma grade calculator to combine your internal assessment and exam paper marks into an estimated subject grade on the 7–1 scale. You can also see what you need on remaining components to reach your target grade.

1. Select grading system

International Baccalaureate Diploma Programme, with subject grades from 7 (highest) to 1 (lowest).

Grade bands

  • 7 – 7 (Excellent) (85–100%)
  • 6 – 6 (Very good) (75–84%)
  • 5 – 5 (Good) (65–74%)
  • 4 – 4 (Satisfactory) (55–64%)
  • 3 – 3 (Mediocre) (45–54%)
  • 2 – 2 (Poor) (35–44%)
  • 1 – 1 (Very poor) (0–34%)

2. Assessments & weights

Add each assignment, quiz or exam with its percentage weight. Marks and weights are automatically clamped between 0 and 100.

AssessmentWeight (%)Score (%)

3. Current and final grade

Completed weight
0.0%
Total weight
100.0%
Current average so far
0.00%
Projected final result
0.00%
1 – 1 (Very poor)

4. What do I need on the final?

Choose a target overall percentage and the assessment you want to solve for. The calculator will estimate the minimum score needed on that assessment.

Required score
Enter some marks first to see what you need.

How IB subject grades work (7 to 1)

In the IB Diploma Programme, each subject is awarded a grade from 7 (highest) to 1 (lowest). Your final subject grade is based on a mix of:

  • Internal assessment (IA) – marked by your teacher, moderated by the IB
  • External exams – usually several papers at the end of the course

Exact weightings vary by subject and level (HL vs SL), but a common pattern is something like 20–30% for IA and 70–80% for written exams. The raw marks are converted to scaled marks and then mapped to the 7–1 grade boundaries set by the IB.

This calculator uses an approximate mapping from percentage to 7–1 grades, so you can quickly see where your combined performance might sit. For exact boundaries, you'll need the official IB documentation for your subject and session.

How to use this IB subject grade calculator

  1. Make sure the grading system is set to IB Diploma (7–1).
  2. Under "Assessments & weights", use each row for one IB component. For example:
    • Internal Assessment (IA)
    • Paper 1
    • Paper 2
    • Paper 3 (for HL subjects)
  3. Enter the weight (%) of each component based on your subject guide. Example for a typical HL subject:
    • IA – 20%
    • Paper 1 – 40%
    • Paper 2 – 40%
  4. When you know your marks for a component (or a good estimate), type your Score (%) into the table.
  5. Look at the Grade summary card to see:
    • Your total weight so far
    • Your current weighted average
    • Your estimated final percentage (once all components have marks)
    • An approximate IB subject grade on the 7–1 scale

You can rename each row, add or remove components, and adjust weights to match any specific IB subject, whether HL or SL.

Estimating what you need for a 6 or 7 in IB

Many IB students aim for a grade 6 or 7 in their higher level subjects, or across their best subjects for university applications. The "What do I need on the final?" section helps you answer:

"What do I need on Paper 2 (or my IA) to end up with a 6 or 7 overall?"

  1. Enter all the grades you already know (for example, IA and Paper 1).
  2. Choose a target overall percentage that roughly matches the grade you are aiming for. As a simplified example:
    • around 85–100% for a 7
    • around 75–84% for a 6
    • around 65–74% for a 5
  3. Select the component you want to solve for (e.g. Paper 2) in the dropdown.
  4. The calculator will show the minimum score you need on that component to reach your target overall percentage.

This is useful for planning how much you need to push in final exams if your IA or earlier papers didn't go as planned.

Limitations of any IB grade calculator

The real IB marking and scaling process is more complex than a simple weighted average:

  • Raw marks are converted to scaled marks using grade boundaries set for each session.
  • Some components use bands and markschemes rather than pure percentages.
  • There are additional rules when calculating the overall Diploma score (TOK, EE, bonus points).

This calculator is designed to give a simple, percentage-based estimate for an individual subject, not an official prediction. Always rely on your school and the IB's official documentation for final results and full Diploma scoring.

Other grade calculators for before and after IB

If you're comparing systems or planning study in another country, you might also want:

  • A-Level grade calculator (A*–E)
  • GCSE 9–1 grade calculator
  • US letter grade calculator (A–F, 4.0 scale)
  • Australian university grade calculator (HD / D / C / P1 / P2)
  • UK honours degree classification calculator

All of these calculators use the same simple interface, so once you understand one, the others will feel familiar and quick to use.

Other free grade calculators

Switch to a different grading system – each calculator uses the same layout so it’s easy to use.