Two weeks out from a major exam, the question that runs in every candidate’s head is the same: “What grade am I actually on track for?” A 62% on the mock could be an A. It could equally be a C. Without grade boundaries, an honest read on the mark, and a sense of how much can move between mock and final, the number on the paper does not tell you what you need to know.

This guide turns mock marks and early-paper performance into an honest grade prediction for IGCSE, GCSE, A-Level and IB DP in the 2026 series. It explains how grade boundaries actually work, where mock marks reliably mislead, how much typical grade movement looks like in the final stretch, and how to use a free grade predictor to forecast — and target — the grade you want.

Why your mock percentage on its own does not tell you your grade

The single most common mistake students make is to read a mock percentage as if it were a grade. “I got 65%, so I’m on track for a B.” That logic does not survive contact with the grade boundary.

Three reasons:

• Grade boundaries shift each series. Cambridge IGCSE Mathematics 0580 Extended boundaries for an A* have varied by 6–8 raw marks between recent series. The same paper score is a different grade in different years.
• Boundaries are paper-specific. A 60% on a hard paper can be an A; a 60% on an easy paper can be a B. Boards adjust to maintain comparable grading standards.
• Mock papers are not real papers. Schools use a mix of past papers, hybrid papers and teacher-set assessments. The “boundaries” your teacher applies to your mock are an estimate, not the official boundary that will apply in June.

The honest read on a mock mark is a range, not a grade. “I got 65% — historically the A boundary for this paper has fallen between 62% and 70%, so I’m on the A/B borderline depending on the paper this year.”

How grade boundaries actually work

Each board sets boundaries after the papers are marked, using a combination of statistical and judgemental methods. The principles in plain language:

• Boundaries reward consistency, not raw difficulty. If a paper is harder than usual, boundaries fall to keep the grade distribution comparable to previous years.
• Boundaries are set per component, then aggregated. Cambridge IGCSE has separate boundaries for each paper; your overall grade comes from the weighted sum.
• Some boards publish historical boundaries for every series. Cambridge International, Pearson Edexcel, AQA and OCR all publish boundary spreadsheets going back several years. The historical range is the best forecast you have.

For a quick lookup of boundaries on any IGCSE, GCSE or A-Level paper, our grade boundary tracker stores the published boundaries from 2019–2024 and lets you see the historical range for an A*, A, B, C or D on each paper at a glance.

What a “realistic” mock-to-final uplift looks like

A common belief among students is that final grades will be a grade higher than mocks because “I’ll work harder in the final fortnight.” This is occasionally true. More often, the uplift is smaller and more predictable than students hope.

Realistic patterns from cohorts we have tutored across IGCSE, GCSE, A-Level and IB DP:

• Top-end students (already on A/A)* typically move up 2–5 raw marks per paper between mock and final. The work has been steady; the mock is close to the final picture.
• Borderline students (B/C boundary) can move up 5–12 raw marks per paper if they revise effectively in the final fortnight — or stay flat / drop slightly if they do not.
• Students well below their target (e.g. predicted C, hoping for an A) almost never close that gap in two weeks. Two grades of movement in 14 days is rare. One grade is achievable for some; half a grade is typical.

The honest conversation: most of your final grade is already locked in by the work of the past 12 months. The final fortnight earns the last half-grade to grade of movement — not the first one.

A free grade predictor that does the maths for you

The Tutopiya Grade Predictor turns your mock marks into a predicted grade range using historical grade boundaries for your paper, plus the realistic uplift band for your starting position. You enter:

• Your board, qualification and subject (Cambridge IGCSE, Pearson Edexcel International GCSE, AQA GCSE, Cambridge International A-Level, Edexcel IAL, IB DP).
• Your mock or early-paper score for each component.
• Optional: how many days remain until your exam.

The tool returns:

• A predicted grade range based on historical boundaries.
• The exact raw marks you need to clear the next grade boundary (e.g. “You need 7 more marks on Paper 4 to move from a B to an A”).
• A focus list showing which paper carries the highest mark-per-effort return for the time you have left.

It is free, browser-based, and works for the major boards’ 2026 syllabuses. There is no signup required to run a prediction.

The predictor is not a guarantee — boundaries shift each year. It is a realistic forecast based on published boundaries, which is more honest than the percentage-to-grade mental shortcut students typically use.

How to read your prediction honestly

A predicted grade range is only useful if you read it without flinching. Three habits help:

1. Believe the lower end of the range

If the predictor says “B/A range”, plan as if it is a B. Top-of-range outcomes happen when revision goes well; bottom-of-range outcomes happen by default. Plan for the floor; the ceiling looks after itself.

2. Look at the marks-to-next-grade number

This is the single most useful number on the prediction. “You need 7 more marks on Paper 4 to move from a B to an A” tells you exactly what the final fortnight is for. Seven marks is concrete: it is a long-answer question, two short-answer questions, or three precise definitions. “Move up a grade” is not concrete and produces unfocused revision.

3. Look at which paper carries the marks-to-next-grade

If the gap is on Paper 4 and you are spending all your time on Paper 6 because you find Paper 6 easier, you are working on the wrong thing. The marks-per-hour-of-revision is highest on the paper closest to a boundary on the topic you are weakest on.

Using a grade prediction to target your final fortnight

The point of a prediction is not the prediction. It is the decision the prediction enables.

A practical pattern for the final fortnight:

• Day 14: Run a prediction. Note the predicted range, the marks-to-next-grade per paper, and the paper carrying the biggest gap.
• Day 13–4: Spend 60–70% of your revision time on the paper carrying the biggest gap. Within that paper, work on the topic where past papers reveal the largest mark loss — not the topic you find most enjoyable. A confidence-rated subject revision checklist is the cleanest way to convert the predictor’s “marks-to-next-grade” number into a topic-by-topic plan; rate the topics on the gap paper, then prioritise Reds.
• Day 3: Run the prediction again with your most recent past-paper score. Has the gap closed? If not, adjust.
• Day 2: Light retrieval and a final pass through the marks-to-next-grade focus topic.
• Day 1: Sleep, light review, no new content.

For the broader last-fortnight pattern that pairs the prediction with active recall and timed practice, see active recall vs highlighting: why flashcards win the last two weeks and how to revise in the last week before IGCSE exams.

A worked example: turning a mock mark into a focused revision plan

To make this concrete, here is the conversation a Cambridge IGCSE Mathematics (Extended) candidate might have with the grade predictor.

• Mock marks: Paper 2 (non-calculator, 80 marks): 48. Paper 4 (calculator, 130 marks): 71.
• Aggregate: 119 / 210 = 56.7%.
• Historical A boundary range for the recent series: 62–68% aggregate.
• Predicted grade range: B (with stretch toward A if Paper 4 lifts).
• Marks to A boundary: approximately 14–18 raw marks across the two papers, depending on the year.
• Where the gap sits: Paper 4 is the larger paper and carries more marks per topic; the candidate’s weakest topic in the mock was probability and statistics.
• Plan: prioritise Paper 4 probability and statistics for the next 10 days. Drill 8–10 past-paper questions on those topics. Continue Paper 2 algebra revision but at lower intensity. Re-run the prediction at day 3 with a fresh past-paper score.

That is what a useful prediction looks like in practice: a number, a paper, a topic, a plan.

Where predictions are less reliable

Three situations where any prediction — ours or anyone else’s — has lower confidence:

Coursework, NEA and Internal Assessment marks

Coursework and NEA marks are typically known before the written papers. They feed into the final grade in a fixed proportion, but their boundary contribution depends on how the rest of the cohort scores. Treat coursework marks as a known input, not a known output.

IB DP predicted grades

The IB predicted grade issued by your school for university applications is a teacher judgment, weighted on Internal Assessment, mocks and engagement. It is not the same as a mark-based prediction from the May session. Use both — the school predicted grade for university planning, the mark-based predictor for revision targeting.

A-Level subjects with significant practical components

A-Level Sciences with practical endorsements (AQA, OCR) include practical assessments that are reported separately. Practical scores do not affect the A*/A/B written-paper grade, but they do affect the overall qualification. Read the predictor output as the written-paper grade, not the full qualification report.

What to do this week if you have just sat your mocks

If your school has just returned mock papers and you have a clear set of marks:

1. Open the grade predictor and enter your mock marks for each component.
2. Note the marks-to-next-grade for each paper. This is your focus list for the final fortnight.
3. Check the grade boundary tracker for the historical range on your paper. Read your predicted grade as a range, not a single value.
4. Set a re-run date for day 3 before the exam. Use a fresh past-paper score on that day to see whether the gap has closed.

For parents reading this with a child mid-exams: the most useful question is not “what grade do you think you will get?” but “which paper has the biggest gap and what is the plan for it?” The first question produces anxiety. The second produces revision.

Frequently asked questions

What grade is 65% in IGCSE?

It depends on the paper, year and board. 65% is typically in the A/B range for many Cambridge IGCSE subjects, but historical A boundaries have varied from roughly 60% to 72% across recent series. Use the grade boundary tracker to look up the actual range for your paper.

How do grade boundaries work?

Boundaries are set after marking, using statistical and judgemental methods to maintain comparable grading standards across years. A harder paper has lower boundaries; an easier paper has higher boundaries. Each component has its own boundary; your overall grade is the weighted aggregate.

How accurate is a grade prediction from mocks?

A mock-based prediction is a forecast with a typical range of plus or minus half a grade to one grade, depending on how close to a boundary you sit and how much time remains. The prediction tightens as you accumulate more recent past-paper scores.

How much can my grade move between mocks and the final?

Top-end students typically move 2–5 raw marks per paper. Borderline students can move 5–12 raw marks with effective final-fortnight revision. Two-grade jumps in two weeks are rare; one grade is achievable for some; half a grade is typical for most.

Can I trust a grade predictor?

A predictor based on published historical boundaries is more honest than a percentage-to-grade mental shortcut. Treat the predicted range as a forecast, not a guarantee — boundaries shift each series, and your own performance varies between mock and final.

What’s the difference between a school predicted grade and a calculated prediction?

A school predicted grade is a teacher judgment used for university applications (UCAS, IB predicted grades). A calculated prediction uses your actual mock marks against historical grade boundaries. They serve different purposes — university planning vs revision targeting — and they often differ.

How do I know which paper to focus on in the final fortnight?

The paper carrying the largest marks-to-next-grade gap on your weakest topic. The grade predictor surfaces this number directly. “7 marks on Paper 4” is more actionable than “work harder on maths”.

Do grade boundaries change every year?

Yes — sometimes by 1–2 raw marks, sometimes by 6–8. Boards adjust to keep grading standards comparable across years. Look at a multi-year range rather than a single year’s boundaries when forecasting.

What if my mock mark is well below my target grade?

Be honest with yourself about what is achievable in the time remaining. A two-grade jump in two weeks is rare. Plan for one grade of realistic movement and target the marks-to-next-grade gap on the paper carrying the biggest swing. Half a grade gained is better than two grades lost to unfocused revision.

Is the Tutopiya grade predictor free?

Yes — the Tutopiya grade predictor is free, browser-based, and supports Cambridge IGCSE, Pearson Edexcel International GCSE, AQA GCSE, Cambridge International A-Level, Edexcel IAL and IB DP. There is no signup required.

Can parents use the grade predictor to support their child?

Yes — the predictor is the cleanest way to turn a mock report into a focused revision plan. The most useful conversation is around the marks-to-next-grade number and which paper to prioritise — not the predicted grade itself.

Should I run the predictor more than once?

Yes. Run it after mocks, then re-run it in the final fortnight with a recent past-paper score. The gap should be closing. If it is not, the revision plan needs to change.

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Last reviewed: 2 May 2026. Predicted grades are forecasts based on historical grade boundaries; actual grades depend on the boundary set after each series and on your performance on the day. Always cross-check with your subject teacher and exam officer.

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