<p>IMO the ACT has a pretty favorable conversion to the SAT. For example, I probably missed 3 problems on the MC of the ACT and got an 8 on the essay, but still got a composite 36, which is often changed into a 2400 on the SAT. I only missed two-three questions on the MC of the SAT with a 7 essay and got a 2270. I didn’t get suddenly smarter when I took the ACT, the test format just favored me more. </p>
<p>The ACT only takes one morning, the only prep time I would do would be to take one practice test of each section, with perhaps two tests on the science section since that seems to cause a lot of problems for some people. I think the concern that “tests take so much time” is a false one. Time taking the test will hardly take away from essay and app writing.</p>