<p>Everyone seems to use slightly different scales. My logic: SATI (old) scores range from ~400-1600, ACT scores from 1-36. Therefore, each 100-point increase in SAT scores is a 3-point increase on the ACT. This would make the average SATI of around 1000-1050 roughly a 19.</p>
<p>S=(100/3)A+400
A=(3(S-400))/100</p>
<p>I'm not familiar with the new one, but guessing a score range of 600-2400 for the SATI, this makes 1 point on the ACT equivalent to 50 on the new SAT. </p>
<p>S=50A+600
A=(S-600)/50</p>
<p>My scores all seem to fit according to these formulas.</p>
<p>To answer your questions, 36 ACT=1600 old SATI=2400 new SATI.</p>
<p>30 ACT=1400 old SATI=2100 new SATI</p>
<p>Hope this helps!
-Chris</p>