What is a Standardised Age Score (SAS) in the 11+?

A Standardised Age Score (SAS) converts a raw 11+ test score into a number that is comparable across children of different ages. It is scaled to a mean of 100 and a standard deviation of 15. Most SAS scales run from 70 to 140. A score above 111 is above average; a score above 121 typically indicates grammar-school readiness.

What is the difference between SAS and a percentage?

A percentage is a raw figure — marks earned over total marks. SAS is age-adjusted and cohort-relative. Two children can score the same percentage but have very different SAS values if one is older and the cohort performed differently.

SAS Score Calculator 11+ | Standardised Age Score

What is a Standardised Age Score (SAS)?

Quick answer

A Standardised Age Score (SAS) converts a raw 11+ mock score into a number you can compare fairly across children of different ages. It is scaled so the average child of any given age scores 100, with one standard deviation equal to 15 points. Most UK grammar schools require an SAS of 111 to 121 to qualify; super-selectives need 130 or higher.

If two children sit the same 11+ mock paper and both score 70%, but one child is 11 years 2 months old and the other is 10 years 4 months old, the younger child has done meaningfully better. Raw percentages can't tell you that. SAS does — it adjusts for age relative to the cohort.

SAS is used by every major UK 11+ exam board: GL Assessment, CEM, ISEB, and CSSE. Different schools publish different SAS pass marks. The calculator above gives you a statistical estimate using the standard formula; the actual SAS your child receives in a real exam is calibrated against the specific cohort that took the same paper that year.

SAS score interpretation table

SAS range	Band	What it means
140+	Top 0.4%	Exceptional. Comfortably above super-selective entry.
130–139	Top 2%	Super-selective grammar entry standard (Henrietta Barnett, Tiffin Boys, QE Boys).
121–129	Top 9%	Strong pass at most grammar schools.
111–120	Top 25%	Pass mark at many grammar schools. Likely qualifying.
100–110	Average	On the national average. Likely below grammar-school threshold.
85–99	Below average	Practice gaps to address before the exam.
Below 85	Bottom 16%	Significant preparation needed.

Always check your target school's published pass mark — some Kent schools allow 111+, some Buckinghamshire CEM schools require 121+, and super-selectives such as Henrietta Barnett, Queen Elizabeth's School Barnet, and The Tiffin Schools typically require 130+. Find your child's nearest grammar schools and their thresholds on the EdifyPod School Finder.

How is the SAS calculated?

The exam board takes three inputs:

Raw mark — marks earned out of marks available.
Age adjustment — within the same school year, younger children typically score lower in absolute terms. A small upward adjustment compensates.
Cohort standardisation — the adjusted score is compared to all children of the same age who sat the same paper, then scaled to mean 100 / SD 15.

The maths underneath is: z = (raw − cohort mean) / cohort SD, then SAS = round(100 + 15 × z + ageAdjustment). The calculator above runs this for you using either the cohort numbers you enter or sensible defaults (mean 60%, SD 14) derived from EdifyPod's national mock cohort.

Frequently asked questions

What SAS score do you need to pass the 11+?

Most grammar schools accept SAS of 111 to 121. Super-selective grammars require 130 or higher. CSSE schools in Essex usually require 303+ across three papers (roughly equivalent to SAS 110+). Always check your target school's current threshold — they change each year.

Is a SAS of 100 a pass?

No. SAS 100 is exactly the national average. To qualify for a grammar school place, your child typically needs to be in the top 25% of the cohort — SAS 111 or higher. Super-selective places require the top 2% (SAS 130+).

What is the highest SAS score possible?

Most SAS scales cap at 140. A few exam boards extend to 141 or use a wider scale for the top 1%. The cap exists because the mathematics of a normal distribution makes scores beyond 140 statistically rare (less than 0.4% of children).

Can SAS scores go down?

Yes. SAS is cohort-relative. If your child does the same raw score in two consecutive mocks but the cohort gets stronger, their SAS will drop. Don't read too much into single-mock SAS movements — trend over 3–5 mocks matters more.

Is this SAS calculator official?

No. This is an estimate using the published statistical formula. Official SAS scores from GL Assessment, CEM, ISEB, and CSSE are computed against the actual cohort that sat the paper that year. Treat this tool as a guide for tracking progress on mock papers.

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