WJEC GCSE Computer Science grade boundaries 2025: A* to G out of 400

WJEC GCSE Computer Science grade boundaries June 2025

The figures are from WJEC's GCSE Grade Points (Non Uniform Mark), June 2025. Computer Science is a linear qualification, so you sit all its units in one series and receive a single grade from one total of weighted marks.

The shares run from 75% at A* down to 10% at G. A C is a little over a third of the marks, at 151.

Where the total comes from

The three units are Understanding Computer Science (100 marks), Computational Thinking and Programming (60 marks) and Software Development (80 marks). Their weighting factors are 2.0, 2.0 and 1.0, so their weighted maximums are 200, 120 and 80, which add to 400. WJEC's sheet gives a notional boundary for each unit, and the table multiplies them by the weights. The sums match the overall boundary at every grade.

For an A*, 74 on Unit 1 counts as 148, 45 on Unit 2 counts as 90 and 62 on Unit 3 counts as 62. Together they make 300. WJEC says its component boundaries are only notional and may not add up exactly where marks are scaled, but for this subject in 2025 they did.

A worked example

Suppose a candidate scores 55 in Unit 1, 33 in Unit 2 and 44 in Unit 3. Weighted, that is 110, 66 and 44, a total of 220. That is above the B boundary of 200 and 29 marks short of the A boundary of 249. The candidate scored 55% on every unit, so the weights make no difference here: 55% of 400 is 220.

What happened to the boundaries in 2026

The next series dropped every grade, the A* by 7 to 293 and the C by 2 to 149. The 2026 page has the table. The weights did not change.

How to use this when you revise

• Every Unit 1 mark counts twice. Its weight of 2.0 makes one mark there worth two marks in Unit 3.
• Find your weakest unit. Because the units are weighted, 10 raw marks in Unit 2 are worth 20 of the 400.
• Do not chase the A* only. The grade was 300 out of 400, and a candidate with 249 still had an A.

Our WJEC GCSE Computer Science guide covers the papers and the newer course.

Try today's paper

Take GCSE Computer Science, the daily paper with 8 questions worth 25 to 35 marks. It is written by us, not WJEC. After you mark it, compare your share with the table above: the 2025 shares run 75%, 62%, 50%, 38%, 31%, 24%, 17% and 10% from A* to G. Several papers give a better picture than one.

Read next

UK · GCSEWJEC GCSE Computer Science grade boundaries 2026WJEC's June 2026 GCSE Computer Science boundaries out of 400, with unit boundaries, a weighted worked grade and the change since 2025.