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There’s a beautiful paper about converting the ACT to the Generation Y SAT (taken April 1995 to March 2016). Apparently there was a massive sample of people who took book the ACT and Generation Y SAT making it possible to equate scores of equal percentile rank within this group that took both tests. The results are as follows:

Once you know the SAT equivalent of your ACT, you can convert the SAT score into an IQ equivalent using this little formula I made:

IQ equivalent = 23.835 + 0.081(SAT) (U.S. norms)

What’s strange is that ACT.org has a chart converting ACT to SATs in 2018

If you use this chart, you can convert SAT to IQ using the formula I created for Generation Z SAT scores (taken after March 2016):

IQ = 26 + 0.07(Combined SAT)

So let’s say you’re a genius who scored a perfect 36 on the ACT.  If you convert to Generation Y SAT scores you get 1600 which converts to IQ 153 using the Generation Y formula.

But if you convert to Generation Z SAT scores, you get 1590 which equates to IQ 137! That’s a difference of 16 points for the same ACT score. 

My guess is that by eliminating all the hardest questions from the SAT so that generation Z could have a safe space and so political correctness could be maintained, the equipercentile equating with ACT scores went awry at the high end. Until further research can clarify this issue, I strongly recommend using the Generation Y conversions, even if you’re in Generation Z.