KS2 SATs scaled scores: what 100 actually means

In England’s Year 6 SATs, your child’s raw marks are converted to a scaled score between 80 and 120 — and 100 is the “expected standard.” Understanding that one sentence removes most of the confusion parents feel on results day.

Which papers are sat

At the end of Key Stage 2, children sit statutory assessments in:

• Reading — one comprehension paper
• Grammar, punctuation and spelling (GPS) — two papers
• Mathematics — three papers (arithmetic + two reasoning)

Writing and Science are teacher-assessed, not examined.

How scaled scores work

Raw marks (the actual points scored) are converted onto a common scale so results are comparable year to year even when papers differ in difficulty:

• 100 — the expected standard
• 110+ — commonly described as working at greater depth / higher standard
• 80 — the minimum reportable score

The conversion tables change slightly each year with the papers — which is precisely why the scaled score, not the raw mark, is the number that matters.

What “expected standard” is not

It is not a pass/fail line for your child’s future. Secondary schools use SATs data for setting and baselines, but children develop at different speeds, and a 97 in Year 6 predicts very little about GCSE outcomes five years later. Treat the score as a snapshot, not a verdict — and make sure your child hears it framed that way too.

Preparing without the pressure

Little-and-often arithmetic fluency, reading widely (comprehension is vocabulary in disguise), and knowing the GPS terminology by name — the SATs really do ask for “fronted adverbials” and “subordinate clauses” — cover most of the ground calmly.

Lumivorx’s UK Primary (KS1–KS2) track practises exactly these: arithmetic fluency, reasoning problems, retrieval and inference, and GPS terms — with an AI tutor that frames everything as “reaching the expected standard,” never pass/fail. Start free for 7 days.