gcse9 min readPublished 2026-07-01

GCSE Grade Calculator 2026: Predict Your Results (AQA, Edexcel, OCR)

How to estimate likely GCSE grades from mock results, coursework, or raw marks — and why the exam board your child sits matters more than most parents realise.

At some point between a set of mock results and results day itself, most parents end up doing the same thing: sitting with a calculator, a scrap of paper, and a set of raw marks, trying to work out what grade their child is actually on track for. It is a completely reasonable thing to want to know. The trouble is that GCSE grading is not a simple percentage system, and doing this by hand is easy to get wrong in ways that either cause unnecessary panic or false reassurance.

This guide explains what a GCSE grade calculator actually does, why raw marks cannot be compared across exam boards, and how to produce a sensible estimate of a likely grade — including where SchoolSteps UK's own free tools can do the arithmetic for you.

What a GCSE Grade Calculator Actually Does

A GCSE grade calculator takes a raw mark — the number of marks a student earned on a paper or across a set of papers — and converts it into a likely grade, using published grade boundaries for a given exam board, subject, and tier. In practice, parents and students reach for one of these tools at three points in the year:

After mock exams, to translate a mark like "112 out of 200" into something that actually means something
Mid-course, using coursework or non-exam assessment marks to sanity-check whether a target grade still looks realistic
In the days after the real exams, once a student has an idea of their raw mark from checking answers against a mark scheme, and wants an early (unofficial) sense of what results day might bring

In all three cases, the calculator is doing the same underlying job: standing in for the exam board's own grade boundary table, which converts raw marks into grades once boundaries are set. The catch is that this table only exists in its true form for exams that have already happened. For anything current, you are always working from an estimate.

Predicted Grade, Target Grade, Mock Grade: Not the Same Thing

These three terms get used almost interchangeably by parents, and sometimes by schools too, but they mean different things — and mixing them up is one of the most common sources of confusion around exam season.

Mock grade is the result from a mock exam, marked by the school (or occasionally an external moderator), usually sat in November, December, or January of Year 11. It reflects performance on that specific paper, on that specific day, often before the course is fully taught.

Predicted grade is a teacher's professional judgement of the grade a student is most likely to achieve in the real exam, based on classwork, mock results, effort, and trajectory. Predicted grades are what schools submit to sixth forms and colleges for conditional offers — they are an informed opinion, not a calculation.

Target grade is usually a data-driven figure generated from a student's prior attainment (often their Key Stage 2 SATs results, run through a benchmarking system such as FFT or ALPS). It represents where a student of similar starting ability nationally tends to end up. It is a statistical baseline, not a ceiling or a promise — plenty of students exceed their target grade, and plenty fall short of it for reasons that have nothing to do with ability.

The practical takeaway: if your child's mock grade, predicted grade, and target grade do not all match, that is normal, not alarming. They are measuring different things. What is worth a conversation with the school is a predicted grade that seems out of step with actual mock performance — that is the one meant to reflect the most realistic likely outcome.

Estimating a Grade by Hand: Marks, Percentages, and Their Limits

If you want to have a go at estimating a likely grade yourself, there are three broad approaches, in increasing order of usefulness.

Percentage alone. The weakest method. A GCSE grade is never simply "70% equals a Grade 7." Boundaries move every year based on how hard a given paper was, so a percentage figure on its own tells you almost nothing reliable.

Raw mark against last year's boundary. Better, but still an estimate. You take the raw mark your child achieved and compare it against the most recently published grade boundary table for that exact exam board, subject, and tier. This gives you a genuinely informative approximation — provided you accept that boundaries can and do shift from one year to the next, sometimes by several marks in either direction.

Teacher prediction, cross-checked against raw marks. The most reliable everyday method for parents, because it combines a professional's holistic judgement with the hard data of an actual mark. If a teacher's prediction and a raw-mark estimate broadly agree, you can trust the picture with reasonable confidence. If they disagree significantly, that is worth asking about directly.

The limitation that applies to all three methods is the same one that applies to any hand calculation: you need the correct total marks, the correct tier, and the correct exam board's boundary table, or the whole estimate is meaningless from the start. This is where most DIY grade calculations go wrong — not through bad maths, but through comparing the wrong numbers.

Why You Cannot Compare Raw Marks Across Exam Boards

This is the single most common mistake parents make when estimating grades by hand, and it is worth being direct about it: a raw mark from one exam board tells you nothing about performance on another board's paper.

AQA, Edexcel (Pearson), and OCR each write entirely separate papers for the same GCSE subject, with different total marks available and independently set grade boundaries. Using GCSE Maths Higher Tier as an illustration from 2025:

|---|---|---|---|---|

A raw score of 200 marks means something completely different depending on which row of that table you are looking at. On OCR, out of 300, it might sit comfortably in Grade 7 territory. On AQA, out of 240, it could already be close to a Grade 9. Comparing your child's raw mark with a cousin's or a friend's at another school, without first checking whether they even sit the same board, is comparing two different scales as though they were one.

This also means that if you are trying to estimate a grade by hand, step one is always confirming which board and tier your child's school actually enters them for — not assuming, checking. The exams officer or subject teacher can confirm this in a two-line email if it is not already on a report.

A Worked Example: Maths, Three Papers

Here is how the estimation actually works in practice. Say a Year 11 student sits three GCSE Maths papers on the AQA Higher tier — Paper 1 (non-calculator), Paper 2, and Paper 3, each out of 80 marks, for a total of 240.

Suppose the student's raw marks were:

Paper 1: 48 out of 80
Paper 2: 52 out of 80
Paper 3: 44 out of 80
Total: 144 out of 240

Using AQA's most recently published Higher tier Maths boundaries as a reference point, a total in the mid-140s has typically landed close to the Grade 6/7 boundary — recent years have set Grade 7 somewhere around the 140-150 mark, with Grade 6 a decade or so below that. On that basis, 144 marks would be a reasonable estimate for a Grade 6, with a realistic chance of Grade 7 if performance holds or slightly improves.

Two caveats matter enormously here. First, this is built on last year's boundaries, not this year's — and boundaries can move by ten marks or more between series if a paper is judged to have been harder or easier than usual. Second, this is an estimate, not a prediction of the actual grade the student will receive. It tells you roughly where a student's current performance would have landed under a previous year's grading, which is a genuinely useful data point — but it is not a guarantee, and it should never be presented to a child as a fixed outcome.

Let the Tools Do the Arithmetic

Doing this calculation by hand, subject by subject, board by board, is exactly the kind of repetitive, error-prone task a calculator exists to remove. SchoolSteps UK has two free tools built specifically for this.

GCSE Grade Calculator takes the grades your child already has — from mocks, coursework, or completed papers — and works out an average, alongside a breakdown of relative strengths and weaknesses across subjects. It is the right tool when you want an overall picture of where a child currently stands, not just a single subject's raw mark.

GCSE Grade Boundaries does the raw-mark-to-grade lookup described in the worked example above, automatically, using the correct total marks and published boundaries for the specific exam board, subject, and tier you select. It removes the single biggest source of error in a hand calculation: accidentally checking the wrong board's table.

Both tools are free, do not require sign-up, and will always be faster and more accurate than working through boundary tables manually — particularly once you are trying to do this across eight or nine GCSE subjects at once, which is the situation most parents are actually in.

The Bottom Line on Estimating Grades

A grade calculator, whether it is a spreadsheet you build yourself or a tool that does the lookup for you, is only ever as good as the boundaries it is built on — and this year's boundaries do not exist until results day. What these tools are genuinely useful for is turning a vague sense of "doing okay" or "worried about Maths" into a specific, board-correct estimate that you can use to have a focused conversation with a teacher, or to decide where revision time is best spent between now and the exams. Treat the number as a compass, not a verdict, and it will do exactly the job it is meant to do.

Frequently Asked Questions

Can a GCSE grade calculator tell me my child's exact final grade?

No. It can only estimate a likely grade based on the most recently published boundaries for that exam board, subject, and tier. Boundaries shift every year, so the real grade can differ from the estimate — sometimes by a full grade in either direction.

Why did my child's raw mark suggest a Grade 6 last year but might mean something different this year?

Because grade boundaries are reset every exam series based on how difficult that year's papers were judged to be. A raw mark that would have been a Grade 6 under last year's boundaries might sit a grade higher or lower once this year's boundaries are published.

Does it matter which exam board my child's school uses?

For the final grade, no — the comparable outcomes system used by Ofqual is designed to keep a Grade 7 on AQA broadly equivalent in standard to a Grade 7 on Edexcel or OCR. For raw-mark calculations, it matters enormously, because each board sets different total marks and boundaries, so you must always use the correct board's table.

What is the difference between a predicted grade and a target grade?

A predicted grade is a teacher's professional judgement based on classroom performance and mock results. A target grade is a statistical benchmark generated from prior attainment data, showing where similar students nationally have typically ended up. They often differ, and that is normal.

Should I be worried if my child's mock grade is lower than their target grade?

Not automatically. Mocks are often marked more harshly than real exams, sat before the course is finished, and revised for less intensively. A gap of one grade between mock and target is common and often closes with focused revision. A gap of three or more grades is worth raising directly with the school.

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