11+ Standardised Score Calculator

Demystify your child's mock exam results. Enter their details and raw score to estimate their Standardised Age Score (SAS) and understand what it means for grammar school entry.

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Understanding the 11+ Score

Grammar school entrance exams don't just use the raw score (the percentage of correct answers). Instead, they use a Standardised Age Score (SAS). This is the fairest way to compare children who were born at different times of the year.

What is a Standardised Age Score (SAS)?

The SAS adjusts a child's raw score based on their exact age in years and months at the time of the test. This ensures younger children in the year group are not at a disadvantage compared to older children.

  • The national average score is set to 100.
  • Most grammar schools require a SAS of 110 or higher.
  • Top-performing schools, as seen on our League Tables, may require scores of 120+.

How is the SAS Calculated?

While the exact formula is a closely guarded secret by exam boards like GL and CEM, it involves:

  1. The Raw Score: The number of questions your child answered correctly.
  2. Age in Months: How old your child is on the day of the test.
  3. The Cohort's Performance: The scores are compared against the average performance of all students taking that specific test.

Our calculator provides a strong estimate by applying an age-adjustment similar to the real process. For the most effective preparation, use the detailed analytics in the Spiral Learning app, which tracks performance against specific 11+ standards.