Work out what an 11+ score actually means
Marks on a practice paper tell you almost nothing on their own. The standardised score depends on how the rest of the year group did and on how old your child was on the day. These calculators do that properly, and tell you where the numbers come from.
CSSE standardised score calculator
For the Essex 11+. CSSE publishes its formula and its cohort figures every year, so for past years this is the official calculation rather than an estimate.
Kent Test score calculator
Estimates a Kent Test score with an age adjustment and checks it against the threshold published for that year. Gives a range, because GL Assessment keeps the conversion tables confidential and a single confident number would be made up.
Why the numbers here have sources on them
Most 11+ score calculators invent their constants and present the result as fact. Some are simply broken — the most visible CSSE calculator online drops a multiplier from the published formula and therefore reports every child as a fail, including one with full marks.
Parents make school choices on these numbers. So everything here is either traceable to the exam board, the council or the school, or it is labelled as an estimate with its assumptions listed. Where something cannot be known from outside the exam board, we say that instead of guessing.